Route 123 is a west–east 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...

 in southeastern 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...

. It crosses northern Bristol

Bristol County, Massachusetts

-Demographics:As of the census of 2000, there were 534,678 people, 205,411 households, and 140,706 families residing in the county. The population density was 962 people per square mile . There were 216,918 housing units at an average density of 390 per square mile...

 and Plymouth

Plymouth County, Massachusetts

Plymouth County is a county located in the U.S. state of Massachusetts. As of 2010, the population was 494,919. Its county seats are Plymouth and Brockton...

 Counties, crossing several highways along the way.

Route description

Route 123 is a continuation of R.I. Route 123, which crosses the state line between Cumberland, Rhode Island

Cumberland, Rhode Island

Cumberland is a town in Providence County, Rhode Island, United States, incorporated in 1746. The population was 33,506 at the 2010 census.-History:...

 and Attleboro

Attleboro, Massachusetts

Attleboro is a city in Bristol County, Massachusetts, United States and is immediately north of Pawtucket, Rhode Island. Once known as "The Jewelry Capital of the World" for its many jewelry manufacturers, Attleboro had a population of 42,068 at the 2000 census, and a population of 43,645 as of...

. In the South Attleboro section of the city, it crosses Routes 1

U.S. Route 1 in Massachusetts

In the U.S. state of Massachusetts, U.S. Route 1 is a major north–south state highway through Boston. The portion of US 1 south of Boston is also known as the Boston-Providence Turnpike, and portions north of the city are known as the Northeast Expressway and the Newburyport Turnpike.-Route...

 and 1A

Massachusetts Route 1A

Route 1A is a south–north state highway in Massachusetts. It is an alternate route to U.S. 1 with three signed sections and two unsigned sections where the highway is concurrent with its parent...

 in quick succession, just south of the junction of the two and the start of the Attleboro-North Attleborough

North Attleborough, Massachusetts

North Attleborough, commonly written North Attleboro, is a town in Bristol County, Massachusetts, United States. The population was 28,712 at the 2010 United States Census.The village of North Attleborough Center is located in the town.-History:...

 retail area. It continues eastward, crossing I-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...

 at Exit 3 before turning northeastward, passing Capron Park

Capron Park Zoo

The Capron Park Zoo is a small zoo that opened in 1937 in Attleboro, Massachusetts, USA. It is home to about 100 animals representing 44 species, Capron Park Zoo is an accredited member of the Association of Zoos and Aquariums and Association of Zoo and Aquarium Docents...

 and the former Attleboro High School building (now a branch of Bristol Community College

Bristol Community College

Bristol Community College is a two-year community college located in Fall River, Massachusetts.-History:The college was originally established in December 1965 when it was instituted by the Massachusetts Board of Regional Community Colleges. Former President John F...

 before reaching downtown Attleboro. It crosses Route 152

Massachusetts Route 152

-Route description:Route 152 is a continuation of R.I. Route 152. The highway runs close to the Rhode Island border for the duration of its run. The highway enters the Bay State in Seekonk, and goes through Attleboro, North Attleborough, and ends at U.S. Route 1 in Plainville.-Junction...

 and under the
MBTA commuter rail

Providence/Stoughton Line

The Providence/Stoughton Line is a line of the MBTA Commuter Rail system running southwest from Boston, Massachusetts, USA. The main line was originally built by the Boston and Providence Rail Road, and now carries service between Boston and T. F. Green Airport, Rhode Island...

 tracks before making another northerly turn, this time at the end of Route 118.

From Attleboro, the route heads eastward into Norton

Norton, Massachusetts

Norton is a town in Bristol County, Massachusetts, United States, and contains the village of Norton Center. The population was 18,036 at the 2000 census...

. It crosses Route 140 at the town center, having a brief, 50-yard concurrency between the two. After passing Wheaton College

Wheaton College (Massachusetts)

Wheaton College is a four-year, private liberal arts college with an approximate student body of 1,550. Wheaton's residential campus is located in Norton, Massachusetts, between Boston, Massachusetts and Providence, Rhode Island. Founded in 1834 as a female seminary, it is one of the oldest...

, it continues through town, crossing I-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 ...

 at Exit 10. (Signage for Exit 10 from I-495 northbound indicate it as "123 to 140 South.") The road then turns northward into Easton

Easton, Massachusetts

Easton is a town in Bristol County, Massachusetts, United States. The population was 23,112 at the 2010 census.Easton is governed by an elected committee of selectmen and a town administrator.- History :...

. In Easton, the road turns eastward again as it becomes concurrent with Route 106

Massachusetts Route 106

-Route description:Route 106 begins in Plainville at Route 1A. The route heads east, intersecting U.S. Route 1 and Route 152 in quick succession, with Turnpike Lake between the three routes. As Route 106 passes south of Lake Mirimichi it enters the town of Foxborough...

 for just over a mile, with Route 123 turning northeastward at the Five Corners intersection between the two routes and Bay Road

Bay Road (Bristol County, Massachusetts)

Bay Road is a 17+ mile north-south road in southeastern Massachusetts that begins at the town line of Canton and Sharon, Norfolk County just north of an intersection with Route 27 at Cobb Corner and ends in Taunton as Bay Street. The road heads south along the Sharon side of the Sharon/Stoughton...

. The route eventually meets Route 138, which it shares a short concurrency with before turning eastward again at Stonehill College

Stonehill College

Stonehill College is a private Roman Catholic college located in Easton, Massachusetts, United States, founded in 1948. Situated in North Easton, Massachusetts, a suburban community of 23,329 people, Stonehill is located south of Boston on a campus, the original estate of Frederick Lothrop Ames...

, entering Brockton

Brockton, Massachusetts

Brockton is a city in Plymouth County, Massachusetts, United States; the population was 93,810 in the 2010 Census. Brockton, along with Plymouth, are the county seats of Plymouth County...

 and Plymouth County

Plymouth County, Massachusetts

Plymouth County is a county located in the U.S. state of Massachusetts. As of 2010, the population was 494,919. Its county seats are Plymouth and Brockton...

.

In Brockton, Route 123 crosses Route 24 at Exits 17 A-B. The route passes the Brockton VA

United States Department of Veterans Affairs

The United States Department of Veterans Affairs is a government-run military veteran benefit system with Cabinet-level status. It is the United States government’s second largest department, after the United States Department of Defense...

 Medical Center, Campanelli Stadium

Campanelli Stadium

Campanelli Stadium is a stadium in Brockton, Massachusetts. It is primarily used for baseball and is the home field of the Brockton Rox Canadian-American Association of Professional Baseball independent minor league baseball team...

, Brockton High School

Brockton High School

Brockton High School, established in 1871, is a high school located in Brockton, Massachusetts and is the largest high school in Massachusetts and New England. Although it is smaller by approximately 200 students than Reading High School, Brockton is one of the largest high schools east of the...

 and the Brockton Fairgrounds in quick succession. At the intersection of Belmont Street and Warren Avenue, the eastbound and westbound lanes split. Eastbound, Route 123 makes a quick turn on and then off of Main Street and crosses Route 28 (North Montello Street) and under the Old Colony railroad tracks before turning left and sharing a short, one-block long concurrency between Route 123 East and Route 27, before meeting the westbound lanes at the intersection of Commercial Street and Centre Street. The westbound lanes, meanwhile only intersect Routes 27 and 28, heading straight from Centre Street, across Main Street and along the short Legion Parkway before turning south onto Warren Avenue to meet up with the main route once more. Signage in the area is poor, however; many maps point to Route 123 begin concurrent along Route 28 rather than following Commercial Street on the other side of the tracks.

Once the two lanes reconnect, they continue eastward along Centre Street, passing the Brockton Hospital before crossing the Beaver Brook into Abington

Abington, Massachusetts

As of the census of 2000, there were 14,605 people, 5,263 households, and 3,747 families residing in the town. The population density was 1,469.1 people per square mile . There were 5,348 housing units at an average density of 538.0 per square mile...

. In Abington, Route 123 crosses Route 18 near the town center before making a quick turn along Washington street and turning eastward again, crossing Old Colony Line tracks once more (adjacent to the Abington MBTA station

Abington (MBTA station)

Abington is a passenger rail station on MBTA Commuter Rail's Plymouth/Kingston Line. It is officially located at 231 Center Avenue east of Park Avenue, but the main entrance to the station's parking lot is located west of Park Avenue. Another one is located south of the parking lot from Summer...

 and Route 58

Massachusetts Route 58

Route 58 is a south–north highway in southeastern Massachusetts. For all but its final , the route lies within Plymouth County.-Route description:...

 before heading into Rockland

Rockland, Massachusetts

Rockland is a town in Plymouth County, Massachusetts, United States. The 2010 census records its population at 17,489. As of December 31, 2009, there are 11,809 registered voters in the community.-History:...

. In Rockland, the route shares a half-mile concurrency with Route 139

Massachusetts Route 139

Route 139 is nominally a west–east state highway in southeastern Massachusetts.-Route description:Route 139 begins in Stoughton Square at the southern junction of the Route 27 and 138 concurrency. The highway heads northeast until the junction with Route 24, at which point the highway heads...

 before turning northward, then eastward into the town of Hanover

Hanover, Massachusetts

Hanover is a town in Plymouth County, Massachusetts, United States. The population was 13,164 at the 2000 census.-History:The area of Hanover was first settled by English settlers in 1649 when William Barstow, a farmer, built a bridge along the North River at what is now Washington Street...

. In Hanover, the route crosses through the northern part of town, crossing Route 3 without junction before meeting Route 53

Massachusetts Route 53

-History:Route 53 follows the former routing of the Kingston to Quincy section of Route 3 which was moved onto the Southeast Expressway and Pilgrim's Highway expressway when they were fully completed in 1963...

 at the village of Assinippi, which provides access between Routes 3 & 123 at Exit 13.

Shortly after the intersection, and just south of Jacobs Pond

Jacobs Pond (Norwell, Massachusetts)

Jacobs Pond is a pond in Norwell, Massachusetts. The pond is located alongside Assinippi, a village in neighboring Hanover. Route 123 runs along the southern shore of the pond. The pond is the headwaters of Third Herring Brook, a tributary of the North River which is the town line between Norwell...

, the route enters Norwell

Norwell, Massachusetts

Norwell is a town in Plymouth County, Massachusetts, United States. The population is currently 10,506 at the 2010 Census.Norwell was first settled in 1634 as a part of the settlement of Satuit , which encompasses present day Scituate and Norwell. It was officially created, in 1849 and soon became...

 as Main Street, traveling through the town's Historic District

Norwell Village Area Historic District

Norwell Village Area Historic District is a historic district on Route 123 in Norwell, Massachusetts.The district was added to the National Register of Historic Places in 1982....

 and village center. Route 123 finally ends after three-quarters of a mile in the neighboring town of Scituate

Scituate, Massachusetts

Scituate is a seacoast town in Plymouth County, Massachusetts, United States, on the South Shore, midway between Boston and Plymouth. The population was 18,133 at the 2010 census....

, at a rotary intersection with Route 3A

Massachusetts Route 3A

Route 3A is a state highway in eastern Massachusetts, which parallels Route 3 and U.S. Route 3 from Cedarville in southern Plymouth to Tyngsborough at the New Hampshire state line....

.

Junction list

County	Location	Mile	Roads intersected	Notes
Bristol Bristol County, Massachusetts -Demographics:As of the census of 2000, there were 534,678 people, 205,411 households, and 140,706 families residing in the county. The population density was 962 people per square mile . There were 216,918 housing units at an average density of 390 per square mile...	Attleboro Attleboro, Massachusetts Attleboro is a city in Bristol County, Massachusetts, United States and is immediately north of Pawtucket, Rhode Island. Once known as "The Jewelry Capital of the World" for its many jewelry manufacturers, Attleboro had a population of 42,068 at the 2000 census, and a population of 43,645 as of...	0.00	RI Route 123	Eastern end of RI Route 123. Western end of Massachusetts Route 123.
		1.2	U.S. Route 1 U.S. Route 1 in Massachusetts In the U.S. state of Massachusetts, U.S. Route 1 is a major north–south state highway through Boston. The portion of US 1 south of Boston is also known as the Boston-Providence Turnpike, and portions north of the city are known as the Northeast Expressway and the Newburyport Turnpike.-Route...	Route 123 provides access between Route 1 north and Route 1A south.
		1.3	Route 1A Massachusetts Route 1A Route 1A is a south–north state highway in Massachusetts. It is an alternate route to U.S. 1 with three signed sections and two unsigned sections where the highway is concurrent with its parent...
		5.6	Route 152 Massachusetts Route 152 -Route description:Route 152 is a continuation of R.I. Route 152. The highway runs close to the Rhode Island border for the duration of its run. The highway enters the Bay State in Seekonk, and goes through Attleboro, North Attleborough, and ends at U.S. Route 1 in Plainville.-Junction...
		5.8	Route 118 South	Northern end of Route 118.
	Norton Norton, Massachusetts Norton is a town in Bristol County, Massachusetts, United States, and contains the village of Norton Center. The population was 18,036 at the 2000 census...	11.3	Route 140	Brief, 50-yard concurrency between the two routes.
		13.1	I-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 Exit 10. (Signed as “123 to 140 South” from I-495 northbound.)
	Easton Easton, Massachusetts Easton is a town in Bristol County, Massachusetts, United States. The population was 23,112 at the 2010 census.Easton is governed by an elected committee of selectmen and a town administrator.- History :...	16.2	Route 106 Massachusetts Route 106 -Route description:Route 106 begins in Plainville at Route 1A. The route heads east, intersecting U.S. Route 1 and Route 152 in quick succession, with Turnpike Lake between the three routes. As Route 106 passes south of Lake Mirimichi it enters the town of Foxborough...  West	Western end of concurrency between routes.
		17.4	Route 106 Massachusetts Route 106 -Route description:Route 106 begins in Plainville at Route 1A. The route heads east, intersecting U.S. Route 1 and Route 152 in quick succession, with Turnpike Lake between the three routes. As Route 106 passes south of Lake Mirimichi it enters the town of Foxborough...  East Bay Road	Eastern end of concurrency between routes 123 and 106 at Five Corners intersection.
		20.1	Route 138 South	Southern end of concurrency between routes.
		20.3	Route 138 North	Northern end of concurrency between routes.
Plymouth Plymouth County, Massachusetts Plymouth County is a county located in the U.S. state of Massachusetts. As of 2010, the population was 494,919. Its county seats are Plymouth and Brockton...	Brockton Brockton, Massachusetts Brockton is a city in Plymouth County, Massachusetts, United States; the population was 93,810 in the 2010 Census. Brockton, along with Plymouth, are the county seats of Plymouth County...	21.7	Route 24	Route 24 Exits 17 A-B.
		24.2	Warren Ave.	Eastbound and Westbound lanes split.
		24.5	Route 28 Route 27 West	Eastbound junction between Route 123 and Route 28. Western end of concurrency between Route 123 East and Route 27 East.
		24.6	Route 27 East	Eastern end of concurrency between Route 123 East & Route 27 East. Wrong-way concurrency between Route 123 East & Route 27 West begins at next block.
		24.8	Route 27 West	End of wrong-way concurrency between Routes 123 and 27. Route 123 eastbound and westbound lanes rejoin.
	Abington Abington, Massachusetts As of the census of 2000, there were 14,605 people, 5,263 households, and 3,747 families residing in the town. The population density was 1,469.1 people per square mile . There were 5,348 housing units at an average density of 538.0 per square mile...	28.7	Route 18
		29.7	Route 58 Massachusetts Route 58 Route 58 is a south–north highway in southeastern Massachusetts. For all but its final , the route lies within Plymouth County.-Route description:...
	Rockland Rockland, Massachusetts Rockland is a town in Plymouth County, Massachusetts, United States. The 2010 census records its population at 17,489. As of December 31, 2009, there are 11,809 registered voters in the community.-History:...	31.0	Route 139 Massachusetts Route 139 Route 139 is nominally a west–east state highway in southeastern Massachusetts.-Route description:Route 139 begins in Stoughton Square at the southern junction of the Route 27 and 138 concurrency. The highway heads northeast until the junction with Route 24, at which point the highway heads...  West	Western end of concurrency between routes.
		31.6	Route 139 Massachusetts Route 139 Route 139 is nominally a west–east state highway in southeastern Massachusetts.-Route description:Route 139 begins in Stoughton Square at the southern junction of the Route 27 and 138 concurrency. The highway heads northeast until the junction with Route 24, at which point the highway heads...  East	Eastern end of concurrency between routes.
	Hanover Hanover, Massachusetts Hanover is a town in Plymouth County, Massachusetts, United States. The population was 13,164 at the 2000 census.-History:The area of Hanover was first settled by English settlers in 1649 when William Barstow, a farmer, built a bridge along the North River at what is now Washington Street...		Route 3	No access between Routes 3 and 123.
		35.7	Route 53 Massachusetts Route 53 -History:Route 53 follows the former routing of the Kingston to Quincy section of Route 3 which was moved onto the Southeast Expressway and Pilgrim's Highway expressway when they were fully completed in 1963...	To Route 3 Exit 13 via Route 53 South.
	Scituate Scituate, Massachusetts Scituate is a seacoast town in Plymouth County, Massachusetts, United States, on the South Shore, midway between Boston and Plymouth. The population was 18,133 at the 2010 census....	41.91	Route 3A Massachusetts Route 3A Route 3A is a state highway in eastern Massachusetts, which parallels Route 3 and U.S. Route 3 from Cedarville in southern Plymouth to Tyngsborough at the New Hampshire state line....	Eastern end of Route 123 at rotary intersection.