Interstate 505 (I-505) is a north–south

auxiliary Interstate Highway Auxiliary Interstate Highways (also called three-digit Interstate Highways) are a subset of highways within the United States' Interstate Highway System. The 323 auxiliary routes generally fall into three types: spur routes, which connect to or i ...

in the

Sacramento Valley The Sacramento Valley is the area of the Central Valley of the U.S. state of California that lies north of the Sacramento–San Joaquin River Delta and is drained by the Sacramento River. It encompasses all or parts of ten Northern California ...

Northern California Northern California (commonly shortened to NorCal) is a geocultural region that comprises the northern portion of the U.S. state of California, spanning the northernmost 48 of the state's List of counties in California, 58 counties. Northern Ca ...

. It is a

spur A spur is a metal tool designed to be worn in pairs on the heels of riding boots for the purpose of directing a horse or other animal to move forward or laterally while riding. It is usually used to refine the riding aids (commands) and to ba ...

auxiliary route of I-5 that runs from near Dunnigan south to

I-80 Interstate 80 (I-80) is an east–west transcontinental freeway that crosses the United States from San Francisco, California, to Teaneck, New Jersey, in the New York metropolitan area. The highway was designated in 1956 as one of the ori ...

Vacaville Vacaville is a city located in Solano County, California, United States. It is located from Sacramento, California, Sacramento and from San Francisco, it is on the edge of the Sacramento Valley in Northern California. The city was founded in ...

. I-505 is primarily a rural Interstate, but travels through Vacaville and the city of Winters. The highway is the primary route connecting the

San Francisco Bay Area The San Francisco Bay Area, commonly known as the Bay Area, is a List of regions of California, region of California surrounding and including San Francisco Bay, and anchored by the cities of Oakland, San Francisco, and San Jose, California, S ...

and the northern

, bypassing

Sacramento Sacramento ( or ; ; ) is the capital city of the U.S. state of California and the seat of Sacramento County. Located at the confluence of the Sacramento and American Rivers in Northern California's Sacramento Valley, Sacramento's 2020 p ...

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

Shasta Cascade The Shasta Cascade region of California is located in the northeastern and north-central sections of the state bordering Oregon and Nevada, including far northern parts of the Central Valley (California), Central Valley and the Sierra Nevada mou ...

and the

Pacific Northwest The Pacific Northwest (PNW; ) is a geographic region in Western North America bounded by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Though no official boundary exists, the most common ...

Power lines Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. The interconnected lines that facilitate this movement form a ''transmission network''. This is ...

connecting

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

Path 66 California Oregon Intertie (COI), identified as Path 66 by Western Electricity Coordinating Council (WECC), is a corridor of three roughly parallel 500 kV alternating current power lines connecting the electric grids of Oregon and California. ...

follow the highway for a while, until one heads

northeast The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A '' compass rose'' is primarily composed of four cardinal directions—north, east, south, and west—eac ...

and the other

northwest The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A '' compass rose'' is primarily composed of four cardinal directions—north, east, south, and west— ...

Route description

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

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

before reaching Winters. I-505 then skirts the eastern

city limits City limits or city boundaries refer to the defined boundary (real estate), boundary or border of a city. The area within the city limit can be called the city proper. Town limit/boundary and village limit/boundary apply to towns and villages. ...

of Winters, intersecting with State Route 128—the only exit in Winters. After leaving that city, the Interstate then proceeds north through rural areas again for about , including an interchange with California State Route 16 near Madison, until it reaches its northern terminus with I-5 near Dunnigan. For its entire length, I-505 is a four-lane freeway (two lanes in each direction) with a maximum speed limit of , which is typical for rural Interstates in California. I-505 is part of the

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 encompasses both state highways and federal highways in California. It was defined by Article 2 (comme ...

, and is part of the National Highway System, a network of highways that are considered essential to the country's economy, defense, and mobility by the

Federal Highway Administration The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two programs, the Federal-aid Highway Program a ...

History

What is now I-505 was originally conceived as part of a loop Interstate with a directional suffix, I-5W. However, I-5W and most of the other Interstates around the country with directional suffixes were eventually renumbered or eliminated, except I-35E and I-35W in Texas and Minnesota.

I-69 Interstate 69 (I-69) is an Interstate Highway in the United States currently consisting of eight unconnected segments. The longest segment runs from Evansville, Indiana, northeast to the Canada–United States border, Canadian border in Po ...

segments I-69W, I-69C, and I-69E in southern Texas have since been designated as well along with proposed suffixed segments for future extensions of I-14 and I-27 to follow. The former route of I-5W now corresponds to I-580 from I-5 south of Tracy to

Oakland Oakland is a city in the East Bay region of the San Francisco Bay Area in the U.S. state of California. It is the county seat and most populous city in Alameda County, with a population of 440,646 in 2020. A major West Coast port, Oakland is ...

from Oakland to Vacaville, and I-505 from Vacaville to I-5 near Dunnigan. The northernmost section of I-505, between SR 16 in Madison and I-5 near Dunnigan, opened in August 1977.

Exit list

References

External links

California @ AARoads.com - I-505
{{3di, 5 05-5 05-5 5

505 Year 505 ( DV) was a common year starting on Saturday of the Julian calendar. At the time, it was known as the Year of the Consulship of Theodorus and Sabinianus (or, less frequently, year 1258 ''Ab urbe condita''). The denomination 505 for t ...

Interstate 05-5 Interstate 05-5

Route description

History

Exit list

See also

References

External links