U.S. Route 20 in Massachusetts
Encyclopedia
The cross-country U.S. Route 20 runs its easternmost 153 miles (246.2 km) in the U.S. state of Massachusetts
Massachusetts
The Commonwealth of Massachusetts is a state in the New England region of the northeastern United States of America. It is bordered by Rhode Island and Connecticut to the south, New York to the west, and Vermont and New Hampshire to the north; at its east lies the Atlantic Ocean. As of the 2010...

. The highway crosses the state border from New Lebanon, New York
New Lebanon, New York
New Lebanon is a town in Columbia County, New York, U.S., southeast of Albany. In 1910, 1,378 people lived in New Lebanon, New York. The population was 2,454 at the 2000 census.The town of New Lebanon is in the northeast part of Columbia County...

 into Hancock, Massachusetts
Hancock, Massachusetts
Hancock is a town in Berkshire County, Massachusetts, United States. It is part of the Pittsfield, Massachusetts Metropolitan Statistical Area. The population was 717 at the 2010 census.- History :...

, and runs eastward into Boston, where it ends at Route 2
Route 2 (Massachusetts)
Route 2 is a major east–west state highway in Massachusetts, parts of which are sometimes known as the Cambridge and Concord Turnpike. Along with Route 9 and U.S. Route 20 to the south, these highways are the main alternatives to the Massachusetts Turnpike/I-90 toll highway...

 in Kenmore Square
Kenmore Square
Kenmore Square is a square in Boston, Massachusetts, United States, consisting of the intersection of several main avenues as well as several other cross streets, and Kenmore Station, an MBTA subway stop. Kenmore Square is close to or abuts Boston University, Fenway Park, and Lansdowne Street, a...

. It spends the vast majority of its journey paralleling the Massachusetts Turnpike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

, which has largely superseded US-20 for through travel. Still, US-20 directly serves many towns and local business areas which the Turnpike bypasses.

U.S. Route 20 is the longest numbered highway in the entire country, and also holds the distinction of being the longest numbered highway in the state, edging out Route 28
Route 28 (Massachusetts)
Route 28 is a nominally south–north route in the U.S. state of Massachusetts, running from the town of Orleans via Boston to the New Hampshire state line in Methuen. Following the route from its nominally southern end, Route 28 initially heads south to the town of Chatham then turns west to...

 by merely a mile (Route 28 is 151.92 miles (244.5 km) long).

Parts of US 20 between the Worcester
Worcester, Massachusetts
Worcester is a city and the county seat of Worcester County, Massachusetts, United States. Named after Worcester, England, as of the 2010 Census the city's population is 181,045, making it the second largest city in New England after Boston....

 and Boston areas were also an alignment of the Boston Post Road
Boston Post Road
The Boston Post Road was a system of mail-delivery routes between New York City and Boston, Massachusetts that evolved into the first major highways in the United States.The three major alignments were the Lower Post Road The Boston Post Road was a system of mail-delivery routes between New York...

, an early colonial highway designated in 1673 for carrying mail between New York City
New York City
New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

 and Boston. US 20 is still locally known as the "Boston Post Road" in the towns of Marlborough, Sudbury, and Weston.

Berkshire County

U.S. Route 20 begins its eastward trek crossing the New York state border into Hancock, Massachusetts
Hancock, Massachusetts
Hancock is a town in Berkshire County, Massachusetts, United States. It is part of the Pittsfield, Massachusetts Metropolitan Statistical Area. The population was 717 at the 2010 census.- History :...

, passing through the southern edge of the Pittsfield State Forest before entering Pittsfield, Massachusetts
Pittsfield, Massachusetts
Pittsfield is the largest city and the county seat of Berkshire County, Massachusetts, United States. It is the principal city of the Pittsfield, Massachusetts Metropolitan Statistical Area which encompasses all of Berkshire County. Its area code is 413. Its ZIP code is 01201...

 and meeting the northern end of Route 41
Route 41 (Massachusetts)
Route 41 is the extension of Connecticut Route 41 into Massachusetts. It begins at the Connecticut state line in Sheffield and ends at U.S. Route 20 in Pittsfield...

. The highway enters town and meets U.S. Route 7, near the western end of the cross-state Route 9
Route 9 (Massachusetts)
Route 9 is a major east–west state highway in Massachusetts. Along with U.S. Route 20, Route 2 and the Massachusetts Turnpike, Route 9 is one of the major east-west routes of Massachusetts, and like the others its eastern terminus is in Boston...

. US-20 turns south along US-7, and the two routes form a concurrency into the town of Lenox
Lenox, Massachusetts
Lenox is a town in Berkshire County, Massachusetts, United States. Set in Western Massachusetts, it is part of the Pittsfield, Massachusetts Metropolitan Statistical Area. The population was 5,077 at the 2000 census. Where the town has a border with Stockbridge is the site of Tanglewood, summer...

. In Lenox, Route 7A
Route 7A (Massachusetts)
Route 7A is a state highway and alternate to U.S. Route 7 in western Massachusetts. It has two posted segments, with a total length of . Between these segments, Route 7A is coextensive with Route 7.-Route description:...

 splits off to serve the center of town, and US-20 splits from US-7 shortly thereafter to serve the town of Lee
Lee, Massachusetts
Lee is a town in Berkshire County, Massachusetts, United States. It is part of the Pittsfield, Massachusetts, metropolitan statistical area. The population was 5,943 which was determined in the 2010 census. Lee, which includes the villages of South and East Lee, is part of the Berkshires resort...

 to the southeast. The highway passes through town and interchanges with the Mass Pike at Exit 2 south of town, near the eastern end of Route 102. US-20 turns to the east at this point, and closely parallels the Mass Pike for several miles, before entering the town of Becket
Becket, Massachusetts
Becket is a town in Berkshire County, Massachusetts, United States. It is part of the Pittsfield, Massachusetts Metropolitan Statistical Area. The population was 1,779 at the 2010 census.- History :...

 and meeting Route 8. Route 8 northbound joins US-20 east to directly serve the town, while the Mass Pike passes south of Becket. Upon crossing through the town center, Route 8 splits from US-20, and the federal highway continues eastbound, passing into the town of Chester
Chester, Massachusetts
Chester is a town in Hampden County, Massachusetts, United States, situated in the western part of the state. It is part of the Springfield, Massachusetts metropolitan statistical area. The town includes the Chester Factory Village Historic District. The total population was 1,337 in the 2010...

 in Hampden County
Hampden County, Massachusetts
-Demographics:As of the census of 2004, there were 461,228 people, 175,288 households, and 115,690 families residing in the county. The population density was 738 people per square mile . There were 185,876 housing units at an average density of 301 per square mile...

.

Hampden County

US-20 passes through the small town of Chester, and clips the southern portion of Huntington
Huntington, Massachusetts
Huntington is a town in Hampshire County, Massachusetts, United States. The population was 2,174 at the 2000 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.- History :...

 in Hampshire County
Hampshire County, Massachusetts
-Demographics:As of the census of 2000, there were 152,251 people, 55,991 households, and 33,818 families residing in the county. The population density was 288 people per square mile . There were 58,644 housing units at an average density of 111 per square mile...

 before re-entering Hampden County and the town of Russell
Russell, Massachusetts
Russell is a town in Hampden County, Massachusetts, United States. The population was 1,775 at the 2010 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.-Geography:...

. US-20 passes through Russell, passes under the Mass Pike and meets the eastern end of Route 23
Route 23 (Massachusetts)
Route 23 is a west–east route in the western Massachusetts counties of Berkshire and Hampden. The entire route is . The vast majority of the road follows the Knox Trail, the historic route of General Henry Knox took to bring cannon from Fort Ticonderoga on Lake Champlain in New York to aid...

, and continues into Westfield
Westfield, Massachusetts
Westfield is a city in Hampden County, in the Pioneer Valley of western Massachusetts, United States. It is part of the Springfield, Massachusetts Metropolitan Statistical Area. The population was 41,094 at the 2010 census. The ZIP Code is 01085 for homes and businesses, 01086 for Westfield State...

. US-20 crosses the US-202/Route 10 concurrency in the center of the town, and intersects the northern end of Route 187 just to the east. US-20 begins to enter urban landscape as it crosses into West Springfield
West Springfield, Massachusetts
The Town of West Springfield is a city in Hampden County, Massachusetts, United States. It is part of the Springfield, Massachusetts Metropolitan Statistical Area. The population was 28,391 at the 2010 census...

, making its way through the streets, intersecting U.S. Route 5
U.S. Route 5
U.S. Route 5 is a north–south United States highway running through the New England states of Connecticut, Massachusetts, and Vermont. Significant cities along the route include New Haven, Connecticut; Hartford, Connecticut; and Springfield, Massachusetts. From Hartford northward to St...

, and crossing the Connecticut River
Connecticut River
The Connecticut River is the largest and longest river in New England, and also an American Heritage River. It flows roughly south, starting from the Fourth Connecticut Lake in New Hampshire. After flowing through the remaining Connecticut Lakes and Lake Francis, it defines the border between the...

 into the city of Springfield
Springfield, Massachusetts
Springfield is the most populous city in Western New England, and the seat of Hampden County, Massachusetts, United States. Springfield sits on the eastern bank of the Connecticut River near its confluence with three rivers; the western Westfield River, the eastern Chicopee River, and the eastern...

. Immediately upon entering the city, US-20 interchanges with Interstate 91
Interstate 91
Interstate 91 is an Interstate Highway in the New England region of the United States. It provides the primary north–south thoroughfare in the western part of New England...

 at Exit 8, where it leaves the surface street (which is picked up by Route 20A), to join Interstate 291
Interstate 291 (Massachusetts)
Interstate 291 is a connector highway in Massachusetts that links Interstate 91 in downtown Springfield with Interstate 90 in Chicopee. I-291 is roughly a northeast/southwest highway. It merges with I-91 at its southwestern terminus, via a flyover...

, which begins just to the south. (Note: Route 20A is NOT a former alignment of US-20. Before the construction of I-291, US-20 followed Main, State Streets, and Boston Road). US-20 is overlapped over most of I-291, running on the Interstate for about 5 miles (8 km), and leaving via Exit 5, where it meets the eastern end of Route 20A and resumes its surface alignment on Page Boulevard in Springfield, rejoining its original alignment in Springfield on Boston Road. US-20, as Boston Road, crosses Route 21 and proceeds east into the town of Wilbraham
Wilbraham, Massachusetts
Wilbraham is a town in Hampden County, Massachusetts, United States. It is also a suburb of the City of Springfield, Massachusetts and part of the Springfield Metropolitan Statistical Area. The population was 14,868 at the 2010 census...

, where it goes back to paralleling the Mass Pike for several more miles, until entering Palmer
Palmer, Massachusetts
The Town of Palmer is a city in Hampden County, Massachusetts, United States. The population was 12,140 as of the 2000 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area...

. In Palmer, US-20 meets the southern end of Route 181 and then intersects Route 32, which provides close access to the Mass Pike at Exit 8. US-20 and Route 32 share a short concurrency in Palmer, before US-20 splits east. Before leaving Palmer, Route 67 meets its southern end at US-20. Brimfield
Brimfield, Massachusetts
Brimfield is a town in Hampden County, Massachusetts, United States. The population was 3,609 at the 2010 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.-Geography:...

 is the last town US-20 passes through in Hampden County; it enters from the west, crosses Route 19
Route 19 (Massachusetts)
Route 19 is a 16.5-mile north–south state highway located in south central Massachusetts. It runs from the Connecticut border in Wales north to an intersection with Massachusetts Route 9 and Massachusetts Route 67 in the town of West Brookfield....

 in the center of town, and proceeds out of town to the east.

Worcester County

US-20 crosses into Worcester County
Worcester County, Massachusetts
-Demographics:In 1990 Worcester County had a population of 709,705.As of the census of 2000, there were 750,963 people, 283,927 households, and 192,502 families residing in the county. The population density was 496 people per square mile . There were 298,159 housing units at an average density...

 and the town of Sturbridge
Sturbridge, Massachusetts
Sturbridge is a town in Worcester County, Massachusetts, United States. It is home to Old Sturbridge Village living history museum and other sites of historical interest such as Tantiusques.The population was 9,268 at the 2010 census...

, immediately meeting the southern end of Route 148. The route continues east where it meets the western end of Route 131 before interchanging with Interstate 84
Interstate 84 (east)
Interstate 84 is an Interstate Highway extending from Dunmore, Pennsylvania at an interchange with Interstate 81 to Sturbridge, Massachusetts, at an interchange with the Massachusetts Turnpike . I-84 has mile-log junction numbering in Pennsylvania; otherwise, exit numbers are roughly sequential...

 at Exit 3. I-84 is another quick route to the Mass Pike, as it ends there less than a mile to the northeast. Route 49
Route 49 (Massachusetts)
Route 49 is a north-south highway located in Worcester County, Massachusetts. For most of its length, the route is known as the Podunk Pike, named for the section of East Brookfield that it passes through. In Spencer and East Brookfield, the route is officially known as the Philip Quinn Memorial...

, a short connector to Route 9 in Spencer
Spencer, Massachusetts
Spencer is a town in Worcester County, Massachusetts, United States. The population was 11,688 at the 2010 census.For geographic and demographic information on the census-designated place Spencer, please see the article Spencer , Massachusetts....

, has its southern terminus at US-20 east of the I-84 interchange. US-20 enters the town of Charlton
Charlton, Massachusetts
Charlton is a town in Worcester County, Massachusetts, United States. The population was 12,981 at the 2010 census.- History :Charlton was first settled in 1735. It was established as a District separated off from Oxford on January 10, 1755, and became a Town in 1775 by a law that made all...

 at this point, passing through Charlton City where it meets the northern end of Route 169 and crosses over Route 31
Route 31 (Massachusetts)
-Route description:It begins at the Connecticut border in Dudley, where a short unnumbered local road changes to MA-31. Through Dudley and Charlton, it is known as Dresser Hill Road. Dresser Hill road winds over Dresser Hill, with several moderately steep grades and some tight corners.In Charlton,...

. Continuing east, US-20 enters the city of Auburn
Auburn, Massachusetts
Auburn is a town in Worcester County, Massachusetts, United States. The population was 16,188 at the 2010 census.- History :Auburn was first settled in 1789 and was officially incorporated in 1808 as the town of Ward, in honor of American Revolution General Artemas Ward...

, south of Worcester
Worcester, Massachusetts
Worcester is a city and the county seat of Worcester County, Massachusetts, United States. Named after Worcester, England, as of the 2010 Census the city's population is 181,045, making it the second largest city in New England after Boston....

, where it briefly overlaps Route 12. Route 12 provides direct access to the Mass Pike at Exit 10, while US-20 directly interchanges with Interstate 395, which becomes Interstate 290
Interstate 290 (Massachusetts)
Interstate 290 runs for from Auburn, Massachusetts to Marlborough, Massachusetts. It is a continuation of I-395 north of I-90 and runs through downtown Worcester, Massachusetts, I-190 splits off, and I-290 runs across Lake Quinsigamond and east to I-495 in Marlborough...

 north of the Mass Pike interchange. US-20 continues to the northeast, entering Millbury
Millbury, Massachusetts
Millbury is a town in Worcester County, Massachusetts, United States. The population was 13,261 at the 2010 census. The town is part of the Blackstone River Valley National Heritage Corridor.-History:...

, where it interchanges with the Mass Pike at Exit 10A, as well as with Route 146
Route 146 (Massachusetts)
Route 146 is a high-speed road, mostly freeway, linking Rhode Island Route 146 to I-290 in Worcester, Massachusetts. South of the interchange with Route 122A, Route 146 is known as the Worcester-Providence Turnpike...

 (which at this point is overlapped by Route 122A). The route continues through Millbury, crossing over Route 122
Route 122 (Massachusetts)
Route 122 is a southeast-northwest state highway in Massachusetts that is a continuation of RI Route 122. The highway is signed as south–north.-Route description:...

, which provides access to the Mass Pike at Exit 11. Leaving Millbury, US-20 enters the town of Shrewsbury
Shrewsbury, Massachusetts
-Demographics:As of the census of 2000, there were 31,640 people, 12,366 households, and 8,693 families residing in the town. The population density was . There were 12,696 housing units at an average density of...

, interchanging with Route 140
Route 140 (Massachusetts)
Route 140 is a long state highway which passes through parts of southeastern and central Massachusetts. The highway follows a southeast-northwest trajectory, running from U.S...

 south of town. The highway continues to the northeast, passing southwest of Shrewsbury, and interchanging with Route 9. Heading almost due north at this point, US-20 crosses into Northborough
Northborough, Massachusetts
Northborough is a town in Worcester County, Massachusetts, United States. The official spelling of the town's name is "Northborough", but the shorter spelling "Northboro" is also used...

, and turns back eastward, intersecting the western end of Route 135
Route 135 (Massachusetts)
Route 135 is a state highway in eastern Massachusetts, running from U.S. Route 20 in Northborough east to Interstate 95 in Dedham. The first of the Boston Marathon, from Hopkinton to Wellesley, follow Route 135.-Route description:...

 in the town center. Two local roads, Church Street and Hudson Street, provide access to nearby I-290, which runs to the north. US-20 proceeds out of Northborough to the northeast, crossing into Marlborough
Marlborough, Massachusetts
Marlborough is a city in Middlesex County, Massachusetts, United States. The population was 38,499 at the 2010 census. Marlborough became a prosperous industrial town in the 19th century and made the transition to high technology industry in the late 20th century after the construction of the...

 and Middlesex County
Middlesex County, Massachusetts
-National protected areas:* Assabet River National Wildlife Refuge* Great Meadows National Wildlife Refuge* Longfellow National Historic Site* Lowell National Historical Park* Minute Man National Historical Park* Oxbow National Wildlife Refuge...

.

Middlesex County

US-20 enters Marlborough and interchanges with Interstate 495
Interstate 495 (Massachusetts)
Interstate 495 is the designation of an Interstate Highway half-beltway in Massachusetts. It was the longest auxiliary Interstate Highway of its kind—measuring 120.74 miles —until 1996, when the PA Route 9 section of the Pennsylvania Turnpike was redesignated as Interstate 476, making it about ...

 (also referred to as the Outer Circumferential Highway) at Exit 24 west of town, effectively crossing into Boston's western suburbs. The route directly serves the center of town, crossing Route 85
Route 85 (Massachusetts)
Route 85, is a north–south state highway in Massachusetts, United States. It passes through the heart of Boston's MetroWest region, through towns on the eastern edge of Worcester County and western edge of Middlesex County, crossing the border between the two counties four times...

 in the process. It is in eastern Marlborough where US-20 begins to be famously referred to as Boston Post Road
Boston Post Road
The Boston Post Road was a system of mail-delivery routes between New York City and Boston, Massachusetts that evolved into the first major highways in the United States.The three major alignments were the Lower Post Road The Boston Post Road was a system of mail-delivery routes between New York...

, and the road continues eastward into the town of Sudbury
Sudbury, Massachusetts
Sudbury is a town in Middlesex County, Massachusetts, United States, population 17,659. The town was incorporated in 1639, with the original boundaries including what is now Wayland. Wayland split from Sudbury in 1780. When first incorporated, it included and parts of Framingham, Marlborough, Stow...

. US-20 passes through the southern part of the town, crossing over the Route 27
Route 27 (Massachusetts)
-Route description:Route 27 runs in a sweeping arc from Kingston to Chelmsford. For most of its route, it acts as an intermediate route between Interstate 95 and Interstate 495....

/Route 126
Route 126 (Massachusetts)
Route 126 is a north–south state highway in Massachusetts. It is a continuation of Rhode Island Route 126-Route description:Route 126 begins at the Rhode Island state line, continuing into Woonsocket as Rhode Island Route 126. After a short stretch in the town of Blackstone and Worcester...

 concurrency in Wayland
Wayland, Massachusetts
Wayland is a town in Middlesex County, Massachusetts, United States. The population was 12,994 at the 2010 census.For geographic and demographic information on Cochituate, which is part of Wayland, please see the article Cochituate, Massachusetts.-History:...

, and continues into Weston
Weston, Massachusetts
Weston is a suburb of Boston located in Middlesex County, Massachusetts, United States in the Boston metro area. The population of Weston, according to the 2010 U.S. Census, is 11,261....

. US-20 does not intersect any major roads or numbered highways in Weston, but does follow an approximately mile-long bypass of the Boston Post Road (appropriately named Boston Post Road Bypass) between Highland Street and Wellesley Street, where US-20 rejoins the road and continues east into Waltham
Waltham, Massachusetts
Waltham is a city in Middlesex County, Massachusetts, United States, was an early center for the labor movement, and major contributor to the American Industrial Revolution. The original home of the Boston Manufacturing Company, the city was a prototype for 19th century industrial city planning,...

, where the Boston Post Road designation ends. Immediately upon crossing the town line, US-20 enters a rotary interchange with Interstate 95
Interstate 95 in Massachusetts
Interstate 95 is the main highway on the East Coast of the United States, paralleling the Atlantic Ocean from Florida to Maine. The Massachusetts portion of the highway enters from the state of Rhode Island in Attleboro and travels in a northeasterly direction to the junction with Route 128 in...

 (Route 128
Route 128 (Massachusetts)
Route 128, also known as the Yankee Division Highway , and originally the Circumferential Highway, is a partial beltway around Boston, Massachusetts, United States. The majority of the highway is built to freeway standards, and about 3/5 of it is part of the Interstate Highway System...

) at Exit 26, marking the change from suburban landscape to the urban landscape of metro Boston. US-20 meets the eastern end of Route 117
Route 117 (Massachusetts)
Route 117 is an east–west state highway in Massachusetts, running from Leominster in northeast Worcester County to Waltham in central Middlesex.-Route description:...

 and cuts through the center of Waltham, serving as Main Street east of Route 117. US-20 also meets the western end of Route 60
Route 60 (Massachusetts)
Route 60 is an east–west state highway running through the northern suburbs of Boston.-Route description:Route 60 begins at U.S. Route 20 in Waltham, just east of downtown. It then heads eastward, passing through the center of Belmont before intersecting in Arlington with Route 2 at that...

, an urban highway serving Boston's northern suburbs, in Waltham. The highway continues into the city of Watertown
Watertown, Massachusetts
The Town of Watertown is a city in Middlesex County, Massachusetts, United States. The population was 31,915 at the 2010 census.- History :Archeological evidence suggests that Watertown was inhabited for thousands of years before the arrival of settlers from England...

 serving as its Main Street to an intersection with Route 16, which passes west and north of Boston via various parkways on the edges of the city, through Cambridge
Cambridge, Massachusetts
Cambridge is a city in Middlesex County, Massachusetts, United States, in the Greater Boston area. It was named in honor of the University of Cambridge in England, an important center of the Puritan theology embraced by the town's founders. Cambridge is home to two of the world's most prominent...

 and Malden
Malden, Massachusetts
Malden is a suburban city in Middlesex County, Massachusetts, United States. The population was 59,450 at the 2010 census. In 2009 Malden was ranked as the "Best Place to Raise Your Kids" in Massachusetts by Bloomberg Businessweek Magazine.-History:...

. US-20 becomes North Beacon Street at this point and continues southwest as it crosses into the city of Boston
Boston
Boston is the capital of and largest city in Massachusetts, and is one of the oldest cities in the United States. The largest city in New England, Boston is regarded as the unofficial "Capital of New England" for its economic and cultural impact on the entire New England region. The city proper had...

 over the North Beacon Street Bridge
North Beacon Street Bridge
The North Beacon Street Bridge is a bridge carrying North Beacon Street over the Charles River between Watertown, MA and Brighton, Boston, MA...

.

Suffolk County (Boston)

US-20 continues as North Beacon Street upon crossing into Boston, immediately intersecting the western end of Soldiers Field Road
Soldiers Field Road
Soldiers Field Road is a major crosstown parkway in Boston, Massachusetts, running west to east from U.S. Route 20 in the neighborhood of Brighton to the Boston University Bridge...

 and crossing under the Mass Pike (no interchange). US-20 continues towards downtown, passing through the Allston neighborhood of Boston. Upon crossing Cambridge Street, US-20 becomes Brighton Ave for a short distance. US-20 soon reaches Commonwealth Ave, and takes the eastbound routing over for Route 30
Route 30 (Massachusetts)
Route 30 is an east–west arterial, connecting Grafton with Packard's Corner in Boston. Route 30 runs roughly parallel to the Massachusetts Turnpike and Route 9, but unlike those two larger highways, takes a more meandering path from town to town...

, which ends at the intersection. At this point, the Brookline
Brookline, Massachusetts
Brookline is a town in Norfolk County, Massachusetts, United States, which borders on the cities of Boston and Newton. As of the 2010 census, the population of the town was 58,732.-Etymology:...

/Norfolk County
Norfolk County, Massachusetts
-National protected areas:* Adams National Historical Park* Boston Harbor Islands National Recreation Area * Frederick Law Olmsted National Historic Site* John Fitzgerald Kennedy National Historic Site-Demographics:...

 border lies just feet south of the road, and US-20 passes through Boston University
Boston University
Boston University is a private research university located in Boston, Massachusetts. With more than 4,000 faculty members and more than 31,000 students, Boston University is one of the largest private universities in the United States and one of Boston's largest employers...

. US-20 crosses Route 2
Route 2 (Massachusetts)
Route 2 is a major east–west state highway in Massachusetts, parts of which are sometimes known as the Cambridge and Concord Turnpike. Along with Route 9 and U.S. Route 20 to the south, these highways are the main alternatives to the Massachusetts Turnpike/I-90 toll highway...

 at the southern end of the Boston University Bridge
Boston University Bridge
The Boston University Bridge , and commonly referred to as the BU Bridge, is a steel truss bridge with a suspended deck carrying Route 2 over the Charles River, connecting Boston to Cambridge, Massachusetts. According to the American Association of State Highway and Transportation Officials route...

, crossing over the Mass Pike for the final time. Route 2, via Mountfort Street, Park Drive, and Beacon Street, turns from south to east to meet US-20 at Kenmore Square
Kenmore Square
Kenmore Square is a square in Boston, Massachusetts, United States, consisting of the intersection of several main avenues as well as several other cross streets, and Kenmore Station, an MBTA subway stop. Kenmore Square is close to or abuts Boston University, Fenway Park, and Lansdowne Street, a...

. Upon meeting Route 2 again, US-20 meets its eastern terminus, with Route 2 taking Commonwealth Ave its final stretch to the Boston Public Garden
Boston Public Garden
The Public Garden, also known as Boston Public Garden, is a large park located in the heart of Boston, Massachusetts, adjacent to Boston Common.-History:...

 and Route 28, where Route 2 meets its own end.

U.S. Route 20 officially ends in Kenmore Square at the intersection of Commonwealth Avenue, Beacon Street, and Brookline Avenue.

Junction list

County Location Milepost Roads intersected Notes
Berkshire
Berkshire County, Massachusetts
Berkshire County is a non-governmental county located on the western edge of the U.S. state of Massachusetts. As of the 2010 census, the population was 131,219. Its largest city and traditional county seat is Pittsfield...

Pittsfield
Pittsfield, Massachusetts
Pittsfield is the largest city and the county seat of Berkshire County, Massachusetts, United States. It is the principal city of the Pittsfield, Massachusetts Metropolitan Statistical Area which encompasses all of Berkshire County. Its area code is 413. Its ZIP code is 01201...

0.0 U.S. Route 20
U.S. Route 20 in New York
U.S. Route 20 is a part of the U.S. Highway System that runs from Newport, Oregon, to Boston, Massachusetts. In the U.S. state of New York, US 20 extends from the Pennsylvania state line at Ripley to the Massachusetts state line in the Berkshire Mountains. US 20 is the longest...

U.S. Route 20 continues west into New York
New York
New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

.
3.3 Route 41
Route 41 (Massachusetts)
Route 41 is the extension of Connecticut Route 41 into Massachusetts. It begins at the Connecticut state line in Sheffield and ends at U.S. Route 20 in Pittsfield...

Northern terminus of Route 41.
7.6 Route 9
Route 9 (Massachusetts)
Route 9 is a major east–west state highway in Massachusetts. Along with U.S. Route 20, Route 2 and the Massachusetts Turnpike, Route 9 is one of the major east-west routes of Massachusetts, and like the others its eastern terminus is in Boston...

Western terminus of Route 9.
7.6
U.S. Route 7 North
Northern terminus of US-7/20 concurrency.
Lenox
Lenox, Massachusetts
Lenox is a town in Berkshire County, Massachusetts, United States. Set in Western Massachusetts, it is part of the Pittsfield, Massachusetts Metropolitan Statistical Area. The population was 5,077 at the 2000 census. Where the town has a border with Stockbridge is the site of Tanglewood, summer...

Route 7A
Route 7A (Massachusetts)
Route 7A is a state highway and alternate to U.S. Route 7 in western Massachusetts. It has two posted segments, with a total length of . Between these segments, Route 7A is coextensive with Route 7.-Route description:...

Northern terminus of Route 7A.
13.5 Route 183 Northern terminus of Route 183.
13.8
U.S. Route 7 South
Southern terminus of US-7/20 concurrency.
Lee
Lee, Massachusetts
Lee is a town in Berkshire County, Massachusetts, United States. It is part of the Pittsfield, Massachusetts, metropolitan statistical area. The population was 5,943 which was determined in the 2010 census. Lee, which includes the villages of South and East Lee, is part of the Berkshires resort...

18.6 Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

I-90/Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

Mass Pike Exit 2.
18.8 Route 102 Eastern terminus of Route 102.
Becket
Becket, Massachusetts
Becket is a town in Berkshire County, Massachusetts, United States. It is part of the Pittsfield, Massachusetts Metropolitan Statistical Area. The population was 1,779 at the 2010 census.- History :...

25.6
Route 8 South
Western terminus of US-20/Route 8 concurrency.
30.8
Route 8 North
Eastern terminus of US-20/Route 8 concurrency.
Hampshire
Hampshire County, Massachusetts
-Demographics:As of the census of 2000, there were 152,251 people, 55,991 households, and 33,818 families residing in the county. The population density was 288 people per square mile . There were 58,644 housing units at an average density of 111 per square mile...

Huntington
Huntington, Massachusetts
Huntington is a town in Hampshire County, Massachusetts, United States. The population was 2,174 at the 2000 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.- History :...

41.8 Route 112
Route 112 (Massachusetts)
Route 112 is a rural highway through western Franklin and Hampshire Counties. It begins at U.S. Route 20 in Huntington and ends at the Vermont state line in Colrain, where it continues as Vermont Route 112.-Route description:...

Southern terminus of Route 112.
Hampden
Hampden County, Massachusetts
-Demographics:As of the census of 2004, there were 461,228 people, 175,288 households, and 115,690 families residing in the county. The population density was 738 people per square mile . There were 185,876 housing units at an average density of 301 per square mile...

Russell
Russell, Massachusetts
Russell is a town in Hampden County, Massachusetts, United States. The population was 1,775 at the 2010 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.-Geography:...

47.9 Route 23
Route 23 (Massachusetts)
Route 23 is a west–east route in the western Massachusetts counties of Berkshire and Hampden. The entire route is . The vast majority of the road follows the Knox Trail, the historic route of General Henry Knox took to bring cannon from Fort Ticonderoga on Lake Champlain in New York to aid...

Eastern terminus of Route 23.
Westfield
Westfield, Massachusetts
Westfield is a city in Hampden County, in the Pioneer Valley of western Massachusetts, United States. It is part of the Springfield, Massachusetts Metropolitan Statistical Area. The population was 41,094 at the 2010 census. The ZIP Code is 01085 for homes and businesses, 01086 for Westfield State...

53.6
U.S. Route 202 North
Route 10 North
Northern terminus of US-20/202/Route 10 concurrency.
To Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

I-90/Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

.
53.8
U.S. Route 202 South
Route 10 South
Southern terminus of US-20/202/Route 10 concurrency.
55.5 Route 187 Northern terminus of Route 187.
West
Springfield
West Springfield, Massachusetts
The Town of West Springfield is a city in Hampden County, Massachusetts, United States. It is part of the Springfield, Massachusetts Metropolitan Statistical Area. The population was 28,391 at the 2010 census...

61.3 U.S. Route 5
Springfield
Springfield, Massachusetts
Springfield is the most populous city in Western New England, and the seat of Hampden County, Massachusetts, United States. Springfield sits on the eastern bank of the Connecticut River near its confluence with three rivers; the western Westfield River, the eastern Chicopee River, and the eastern...

61.8 - 63.0 Interstate 91
Interstate 91
Interstate 91 is an Interstate Highway in the New England region of the United States. It provides the primary north–south thoroughfare in the western part of New England...


Interstate 291
Interstate 291 (Massachusetts)
Interstate 291 is a connector highway in Massachusetts that links Interstate 91 in downtown Springfield with Interstate 90 in Chicopee. I-291 is roughly a northeast/southwest highway. It merges with I-91 at its southwestern terminus, via a flyover...


Route 20A
Western terminus of Route 20A.
Brief multiplex with I-91, Exits 8-9.
Western terminus of I-291; western terminus of I-291/US-20 concurrency, Exit 1.
To Route 116, via Route 20A.
See Interstate 291
Interstate 291 (Massachusetts)
Interstate 291 is a connector highway in Massachusetts that links Interstate 91 in downtown Springfield with Interstate 90 in Chicopee. I-291 is roughly a northeast/southwest highway. It merges with I-91 at its southwestern terminus, via a flyover...

 for concurrency with US-20, Exits 1-5.
66.0
Interstate 291
Interstate 291 (Massachusetts)
Interstate 291 is a connector highway in Massachusetts that links Interstate 91 in downtown Springfield with Interstate 90 in Chicopee. I-291 is roughly a northeast/southwest highway. It merges with I-91 at its southwestern terminus, via a flyover...

 East
Route 20A
Eastern terminus of Route 20A.
Eastern terminus of I-291/US-20 concurrency, Exit 5.
To Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

I-90/Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

, via I-291 East.
69.6 Route 21
Route 141
Southern terminus of Route 21, eastern terminus of Route 141.
To Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

I-90/Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

, via Route 21 North.
Palmer
Palmer, Massachusetts
The Town of Palmer is a city in Hampden County, Massachusetts, United States. The population was 12,140 as of the 2000 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area...

78.0 Route 181 Southern terminus of Route 181.
79.0
Route 32 North
Western terminus of US-20/Route 32 concurrency.
To Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

I-90/Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

.
80.0
Route 32 South
Eastern terminus of US-20/Route 32 concurrency.
81.5 Route 67 Southern terminus of Route 67.
Brimfield
Brimfield, Massachusetts
Brimfield is a town in Hampden County, Massachusetts, United States. The population was 3,609 at the 2010 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.-Geography:...

Route 19
Route 19 (Massachusetts)
Route 19 is a 16.5-mile north–south state highway located in south central Massachusetts. It runs from the Connecticut border in Wales north to an intersection with Massachusetts Route 9 and Massachusetts Route 67 in the town of West Brookfield....

Worcester
Worcester County, Massachusetts
-Demographics:In 1990 Worcester County had a population of 709,705.As of the census of 2000, there were 750,963 people, 283,927 households, and 192,502 families residing in the county. The population density was 496 people per square mile . There were 298,159 housing units at an average density...

Sturbridge
Sturbridge, Massachusetts
Sturbridge is a town in Worcester County, Massachusetts, United States. It is home to Old Sturbridge Village living history museum and other sites of historical interest such as Tantiusques.The population was 9,268 at the 2010 census...

Route 148 Southern terminus of Route 148.
Route 131 Western terminus of Route 131.
Interstate 84
Interstate 84 (east)
Interstate 84 is an Interstate Highway extending from Dunmore, Pennsylvania at an interchange with Interstate 81 to Sturbridge, Massachusetts, at an interchange with the Massachusetts Turnpike . I-84 has mile-log junction numbering in Pennsylvania; otherwise, exit numbers are roughly sequential...

I-84 Exit 3.
To Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

I-90/Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

, via I-84 East.
Route 49
Route 49 (Massachusetts)
Route 49 is a north-south highway located in Worcester County, Massachusetts. For most of its length, the route is known as the Podunk Pike, named for the section of East Brookfield that it passes through. In Spencer and East Brookfield, the route is officially known as the Philip Quinn Memorial...

Southern terminus of Route 49.
Charlton
Charlton, Massachusetts
Charlton is a town in Worcester County, Massachusetts, United States. The population was 12,981 at the 2010 census.- History :Charlton was first settled in 1735. It was established as a District separated off from Oxford on January 10, 1755, and became a Town in 1775 by a law that made all...

Route 169 Northern terminus of Route 169.
Route 31
Route 31 (Massachusetts)
-Route description:It begins at the Connecticut border in Dudley, where a short unnumbered local road changes to MA-31. Through Dudley and Charlton, it is known as Dresser Hill Road. Dresser Hill road winds over Dresser Hill, with several moderately steep grades and some tight corners.In Charlton,...

Oxford
Oxford, Massachusetts
Oxford is a town in Worcester County, Massachusetts, United States. The population was 13,709 at the 2010 census.For geographic and demographic information on the census-designated place Oxford, please see the article Oxford , Massachusetts.-History:...

Route 56
Auburn
Auburn, Massachusetts
Auburn is a town in Worcester County, Massachusetts, United States. The population was 16,188 at the 2010 census.- History :Auburn was first settled in 1789 and was officially incorporated in 1808 as the town of Ward, in honor of American Revolution General Artemas Ward...


Route 12 South
Western terminus of US-20/Route 12 concurrency.

Route 12 North
Eastern terminus of US-20/Route 12 concurrency.
To Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

I-90/Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

.
Interstate 395 I-395 Exits 6A-B.
To I-290
Interstate 290 (Massachusetts)
Interstate 290 runs for from Auburn, Massachusetts to Marlborough, Massachusetts. It is a continuation of I-395 north of I-90 and runs through downtown Worcester, Massachusetts, I-190 splits off, and I-290 runs across Lake Quinsigamond and east to I-495 in Marlborough...

, via I-395 North.
Millbury
Millbury, Massachusetts
Millbury is a town in Worcester County, Massachusetts, United States. The population was 13,261 at the 2010 census. The town is part of the Blackstone River Valley National Heritage Corridor.-History:...

Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

I-90/Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...


Route 146
Route 146 (Massachusetts)
Route 146 is a high-speed road, mostly freeway, linking Rhode Island Route 146 to I-290 in Worcester, Massachusetts. South of the interchange with Route 122A, Route 146 is known as the Worcester-Providence Turnpike...


Route 122A
Mass Pike Exit 10A.
Route 146 Exit 10, concurrent with Route 122A.
Connecting road provides access to the Mass Pike and Route 146.
Route 122
Route 122 (Massachusetts)
Route 122 is a southeast-northwest state highway in Massachusetts that is a continuation of RI Route 122. The highway is signed as south–north.-Route description:...

Interchange.
To Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

I-90/Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

, via Route 122 South.
Shrewsbury
Shrewsbury, Massachusetts
-Demographics:As of the census of 2000, there were 31,640 people, 12,366 households, and 8,693 families residing in the town. The population density was . There were 12,696 housing units at an average density of...

Route 140
Route 140 (Massachusetts)
Route 140 is a long state highway which passes through parts of southeastern and central Massachusetts. The highway follows a southeast-northwest trajectory, running from U.S...

Interchange.
Route 9
Route 9 (Massachusetts)
Route 9 is a major east–west state highway in Massachusetts. Along with U.S. Route 20, Route 2 and the Massachusetts Turnpike, Route 9 is one of the major east-west routes of Massachusetts, and like the others its eastern terminus is in Boston...

Interchange.
Northborough
Northborough, Massachusetts
Northborough is a town in Worcester County, Massachusetts, United States. The official spelling of the town's name is "Northborough", but the shorter spelling "Northboro" is also used...

Route 135
Route 135 (Massachusetts)
Route 135 is a state highway in eastern Massachusetts, running from U.S. Route 20 in Northborough east to Interstate 95 in Dedham. The first of the Boston Marathon, from Hopkinton to Wellesley, follow Route 135.-Route description:...

Western terminus of Route 135.
Middlesex
Middlesex County, Massachusetts
-National protected areas:* Assabet River National Wildlife Refuge* Great Meadows National Wildlife Refuge* Longfellow National Historic Site* Lowell National Historical Park* Minute Man National Historical Park* Oxbow National Wildlife Refuge...

Marlborough
Marlborough, Massachusetts
Marlborough is a city in Middlesex County, Massachusetts, United States. The population was 38,499 at the 2010 census. Marlborough became a prosperous industrial town in the 19th century and made the transition to high technology industry in the late 20th century after the construction of the...

Interstate 495
Interstate 495 (Massachusetts)
Interstate 495 is the designation of an Interstate Highway half-beltway in Massachusetts. It was the longest auxiliary Interstate Highway of its kind—measuring 120.74 miles —until 1996, when the PA Route 9 section of the Pennsylvania Turnpike was redesignated as Interstate 476, making it about ...

I-495 Exits 24A-B.
To I-290
Interstate 290 (Massachusetts)
Interstate 290 runs for from Auburn, Massachusetts to Marlborough, Massachusetts. It is a continuation of I-395 north of I-90 and runs through downtown Worcester, Massachusetts, I-190 splits off, and I-290 runs across Lake Quinsigamond and east to I-495 in Marlborough...

, via I-495 North.
Route 85
Route 85 (Massachusetts)
Route 85, is a north–south state highway in Massachusetts, United States. It passes through the heart of Boston's MetroWest region, through towns on the eastern edge of Worcester County and western edge of Middlesex County, crossing the border between the two counties four times...

Wayland
Wayland, Massachusetts
Wayland is a town in Middlesex County, Massachusetts, United States. The population was 12,994 at the 2010 census.For geographic and demographic information on Cochituate, which is part of Wayland, please see the article Cochituate, Massachusetts.-History:...

Route 27
Route 27 (Massachusetts)
-Route description:Route 27 runs in a sweeping arc from Kingston to Chelmsford. For most of its route, it acts as an intermediate route between Interstate 95 and Interstate 495....


Route 126
Route 126 (Massachusetts)
Route 126 is a north–south state highway in Massachusetts. It is a continuation of Rhode Island Route 126-Route description:Route 126 begins at the Rhode Island state line, continuing into Woonsocket as Rhode Island Route 126. After a short stretch in the town of Blackstone and Worcester...

Waltham
Waltham, Massachusetts
Waltham is a city in Middlesex County, Massachusetts, United States, was an early center for the labor movement, and major contributor to the American Industrial Revolution. The original home of the Boston Manufacturing Company, the city was a prototype for 19th century industrial city planning,...

Interstate 95
Interstate 95 in Massachusetts
Interstate 95 is the main highway on the East Coast of the United States, paralleling the Atlantic Ocean from Florida to Maine. The Massachusetts portion of the highway enters from the state of Rhode Island in Attleboro and travels in a northeasterly direction to the junction with Route 128 in...


Route 128
Route 128 (Massachusetts)
Route 128, also known as the Yankee Division Highway , and originally the Circumferential Highway, is a partial beltway around Boston, Massachusetts, United States. The majority of the highway is built to freeway standards, and about 3/5 of it is part of the Interstate Highway System...

I-95 Exit 26.
To Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

I-90/Mass Pike
Massachusetts Turnpike
The Massachusetts Turnpike is the easternmost stretch of Interstate 90. The Turnpike begins at the western border of Massachusetts in West Stockbridge connecting with the Berkshire Connector portion of the New York State Thruway...

, via I-95/Route 128 South.
Route 117
Route 117 (Massachusetts)
Route 117 is an east–west state highway in Massachusetts, running from Leominster in northeast Worcester County to Waltham in central Middlesex.-Route description:...

Eastern terminus of Route 117.
Route 60
Route 60 (Massachusetts)
Route 60 is an east–west state highway running through the northern suburbs of Boston.-Route description:Route 60 begins at U.S. Route 20 in Waltham, just east of downtown. It then heads eastward, passing through the center of Belmont before intersecting in Arlington with Route 2 at that...

Western terminus of Route 60.
Watertown
Watertown, Massachusetts
The Town of Watertown is a city in Middlesex County, Massachusetts, United States. The population was 31,915 at the 2010 census.- History :Archeological evidence suggests that Watertown was inhabited for thousands of years before the arrival of settlers from England...

Route 16
Suffolk
Suffolk County, Massachusetts
Suffolk County has no land border with Plymouth County to its southeast, but the two counties share a water boundary in the middle of Massachusetts Bay.-National protected areas:*Boston African American National Historic Site...

Boston Route 30
Route 30 (Massachusetts)
Route 30 is an east–west arterial, connecting Grafton with Packard's Corner in Boston. Route 30 runs roughly parallel to the Massachusetts Turnpike and Route 9, but unlike those two larger highways, takes a more meandering path from town to town...


(Commonwealth Avenue)
Eastern terminus of Route 30.
Route 2
Route 2 (Massachusetts)
Route 2 is a major east–west state highway in Massachusetts, parts of which are sometimes known as the Cambridge and Concord Turnpike. Along with Route 9 and U.S. Route 20 to the south, these highways are the main alternatives to the Massachusetts Turnpike/I-90 toll highway...


(Essex Street/Boston University Bridge)
To U.S. Route 3 (Memorial Drive), via Route 2 West/B.U. Bridge.
153 Route 2
Route 2 (Massachusetts)
Route 2 is a major east–west state highway in Massachusetts, parts of which are sometimes known as the Cambridge and Concord Turnpike. Along with Route 9 and U.S. Route 20 to the south, these highways are the main alternatives to the Massachusetts Turnpike/I-90 toll highway...


(Beacon Street/Commonwealth Avenue)
Eastern terminus of U.S. Route 20.
To Route 28
Route 28 (Massachusetts)
Route 28 is a nominally south–north route in the U.S. state of Massachusetts, running from the town of Orleans via Boston to the New Hampshire state line in Methuen. Following the route from its nominally southern end, Route 28 initially heads south to the town of Chatham then turns west to...

, via Comm Ave/Route 2 East.

Suffixed routes

Route 20A is a state highway
State highway
State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 located entirely within Springfield, Massachusetts
Springfield, Massachusetts
Springfield is the most populous city in Western New England, and the seat of Hampden County, Massachusetts, United States. Springfield sits on the eastern bank of the Connecticut River near its confluence with three rivers; the western Westfield River, the eastern Chicopee River, and the eastern...

, United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. The route, an alternate route of U.S. Route 20, parallels the section of U.S. 20 concurrent with Interstate 291
Interstate 291 (Massachusetts)
Interstate 291 is a connector highway in Massachusetts that links Interstate 91 in downtown Springfield with Interstate 90 in Chicopee. I-291 is roughly a northeast/southwest highway. It merges with I-91 at its southwestern terminus, via a flyover...

. The western terminus is at U.S. 20 and Interstate 91
Interstate 91
Interstate 91 is an Interstate Highway in the New England region of the United States. It provides the primary north–south thoroughfare in the western part of New England...

 in downtown Springfield east of where U.S. 20 crosses the Connecticut River
Connecticut River
The Connecticut River is the largest and longest river in New England, and also an American Heritage River. It flows roughly south, starting from the Fourth Connecticut Lake in New Hampshire. After flowing through the remaining Connecticut Lakes and Lake Francis, it defines the border between the...

 on the North End Bridge. The eastern terminus is at U.S. 20 and I-291 northeast of the city.

This alignment provides an alternate to Interstate 291, which overlaps US 20 for much of its length, but was originally an alternate to old US 20, which ran down State Street and Boston Road. This route was therefore never part of US 20, but has served as an alternate to two separate routes.
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