Interstate 505 is an Interstate Highway in California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

 between Interstate 80

Interstate 80 in California

In the U.S. state of California, Interstate 80 , a major east–west route of the Interstate Highway System, has its western terminus in San Francisco, California, United States. From there it heads east across the Bay Bridge to Oakland, where it turns north and crosses the Carquinez Bridge...

 in Vacaville

Vacaville, California

Vacaville, California is a city located in the northeastern portion of the San Francisco Bay Area in Solano County. The city is nearly half way between Sacramento and San Francisco on I-80. It sits approximately from Sacramento, and from San Francisco...

 and Interstate 5

Interstate 5 in California

Interstate 5 is a major north–south route of the Interstate Highway System in the U.S. state of California. It begins at the Mexico – United States border at the San Ysidro crossing, goes north across the length of California and crosses into Oregon south of the Medford-Ashland metropolitan...

 near Dunnigan

Dunnigan, California

Dunnigan is a census-designated place in Yolo County, California on Interstate 5. The population was 1,416 at the 2010 census. Dunnigan's ZIP code is 95937 and its area code 530. It lies at an elevation of 69 feet .-History:...

. I-505 is primarily a rural interstate, but travels through Vacaville and the city of Winters

Winters, California

Winters is a city in Yolo County, California. The population was 6,624 as of the 2010 census. It is part of the Sacramento–Arden-Arcade–Roseville Metropolitan Statistical Area. The city is near Lake Berryessa. It is noted as the one-time residence of cartoonist R...

. The interstate is the primary route connecting the San Francisco Bay Area

San Francisco Bay Area

The San Francisco Bay Area, commonly known as the Bay Area, is a populated region that surrounds the San Francisco and San Pablo estuaries in Northern California. The region encompasses metropolitan areas of San Francisco, Oakland, and San Jose, along with smaller urban and rural areas...

 and the northern Sacramento Valley

Sacramento Valley

The Sacramento Valley is the portion of the California Central Valley that lies to the north of the San Joaquin-Sacramento Delta in the U.S. state of California. It encompasses all or parts of ten counties.-Geography:...

, bypassing Sacramento

Sacramento, California

Sacramento is the capital city of the U.S. state of California and the county seat of Sacramento County. It is located at the confluence of the Sacramento River and the American River in the northern portion of California's expansive Central Valley. With a population of 466,488 at the 2010 census,...

 and its attendant city traffic. Thus, it is a major route for travelers heading directly from the San Francisco Bay Area to the Pacific Northwest

Pacific Northwest

The Pacific Northwest is a region in northwestern North America, bounded by the Pacific Ocean to the west and, loosely, by the Rocky Mountains on the east. Definitions of the region vary and there is no commonly agreed upon boundary, even among Pacific Northwesterners. A common concept of the...

.

This route is part of the California Freeway and Expressway System

California Freeway and Expressway System

The California Freeway and Expressway System is a system of existing or planned freeways and expressways in the U.S. state of California. It is defined by the Streets and Highways Code.-List of roads in the system:*State Route 1 *State Route 2...

.

Power line

Electric power transmission

Electric-power transmission is the bulk transfer of electrical energy, from generating power plants to Electrical substations located near demand centers...

s connecting Path 15

Path 15

Path 15 is an portion of the north-south power transmission corridor in California, U.S. It forms a part of the Pacific AC Intertie and the California-Oregon Transmission Project....

 to Path 66

Path 66

Path 66 is the name of several 500 kV power lines that were built by Western Area Power Administration , Pacific Gas & Electric , and PacifiCorp in the early 1970s to 1990s and totally completed in 1993...

 follow the highway for a while, until one heads northeast and the other northwest.

Route description

The southern terminus of I-505 is at I-80 next to the Nut Tree Airport

Nut Tree Airport

Nut Tree Airport is a county-owned public-use airport located two nautical miles northeast of the central business district of Vacaville, in Solano County, California, United States.The airport is near the junction of Interstates 80 and 505...

 in the Nut Tree area in Vacaville

Vacaville, California

Vacaville, California is a city located in the northeastern portion of the San Francisco Bay Area in Solano County. The city is nearly half way between Sacramento and San Francisco on I-80. It sits approximately from Sacramento, and from San Francisco...

. From there, it travels north about ten miles through rural areas near the western edge of the Sacramento Valley

Sacramento Valley

The Sacramento Valley is the portion of the California Central Valley that lies to the north of the San Joaquin-Sacramento Delta in the U.S. state of California. It encompasses all or parts of ten counties.-Geography:...

 before reaching Winters

Winters, California

Winters is a city in Yolo County, California. The population was 6,624 as of the 2010 census. It is part of the Sacramento–Arden-Arcade–Roseville Metropolitan Statistical Area. The city is near Lake Berryessa. It is noted as the one-time residence of cartoonist R...

. I-505 then skirts the eastern city limits of Winters, intersecting with State Route 128

California State Route 128

State Route 128 is a state highway in the U.S. state of California, connecting the Mendocino coast to the Central Valley through the state's Wine Country.-Route description:...

 – the only exit in Winters. After leaving that city, the interstate then proceeds north through rural areas again for about 20 miles until it reaches its northern terminus with I-5 near Dunnigan

Dunnigan, California

Dunnigan is a census-designated place in Yolo County, California on Interstate 5. The population was 1,416 at the 2010 census. Dunnigan's ZIP code is 95937 and its area code 530. It lies at an elevation of 69 feet .-History:...

.

For most of its length, I-505 is a four-lane freeway, which is typical for rural interstates in California.

Exit list

Note: Except where prefixed with a letter, postmiles were measured in 1964, based on the alignment as it existed at that time, and do not necessarily reflect current mileage. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.

{| class=wikitable
!County
!Location
!Postmile

!Exit

Exit number

An exit number is a number assigned to a road junction, usually an exit from a freeway. It is usually marked on the same sign as the destinations of the exit, as well as a sign in the gore....

!Destinations
!Notes
|-
|rowspan=6|Solano

Solano County, California

Solano County is a county located in Bay-Delta region of the U.S. state of California, about halfway between San Francisco and Sacramento and is one of the nine San Francisco Bay Area counties. The county's population was reported by the U.S. Census to be 413,344 in 2010...

SOL R0.00-R10.63
|rowspan=4|Vacaville

Vacaville, California

Vacaville, California is a city located in the northeastern portion of the San Francisco Bay Area in Solano County. The city is nearly half way between Sacramento and San Francisco on I-80. It sits approximately from Sacramento, and from San Francisco...

|R0.00
|1
|
|Southbound exit and northbound entrance; signed as exits 1A (west) and 1B (east)
|-bgcolor=#ffdddd
|R0.00
|1B
|Monte Vista Avenue
|Southbound exit and northbound entrance
|-
|R1.45
|1C
|Vaca Valley Parkway
|Signed as exit 1 northbound
|-
|R3.08
|3
|Midway Road
|
|-
|
|R5.59
|6
|Allendale Road
|
|-
|rowspan=2|
|rowspan=2|R10.62
|rowspan=2|10
|rowspan=2|Putah Creek Road
|rowspan=2|
|-
|rowspan=9|Yolo

Yolo County, California

Yolo County is a county located in the northern part of the U.S. state of California, bordered by the other counties of Sacramento, Solano, Napa, Lake, Colusa, and Sutter. The city of Woodland is its county seat, though Davis is its largest city....

YOL 0.00-R22.36
|-
|
|0.40
|11
|
|
|-
|
|4.03
|15
|Road 29A
|
|-
|
|6.53
|17
|Road 27
|
|-
|
|10.62
|21
|
|
|-
|
|13.43
|24
|Road 19
|
|-
|
|17.45
|28
|Road 14 (CR E10) – Zamora

Zamora, California

Zamora is an unincorporated community in rural Yolo County, California, U.S., on Interstate 5 due west of Knights Landing. Its ZIP code is 95698 and its area code 530. It is in the northern part of the county...

|
|-
|
|20.13
|31
|Road 12A
|
|-
|
|bgcolor=#ffdddd|R22.36
|bgcolor=#ffdddd|
|bgcolor=#ffdddd|
|bgcolor=#ffdddd|Northbound exit and southbound entrance

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