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Interstate 505 (California): Wikis


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Interstate 505 shield
Interstate 505
Auxiliary route of the Interstate Highway System
Defined by S&HC § 617, maintained by Caltrans
Length: 32.99 mi[1] (53.09 km)
Formed: 1977
South end: I-80 in Vacaville
North end: I-5 near Dunnigan
State highways in California (list - pre-1964)
< I-405 I-580 >
History - Unconstructed - Deleted - Freeway - Scenic

Interstate 505 (I-505) is an Interstate Highway in California between Interstate 80 in Vacaville and Interstate 5. I-505 is primarily a rural interstate, but travels through Vacaville and the town of Winters. The interstate is the primary route connecting the San Francisco Bay Area and the northern Sacramento Valley, bypassing Sacramento and its attendant city traffic. It also connects the San Francisco Bay Area and the Pacific Northwest in cities such as Portland, Seattle, and Vancouver.

This route is part of the California Freeway and Expressway System[2].

Power lines connecting Path 15 to Path 66 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 in the Nut Tree area in Vacaville. From there, it travels north about ten miles through rural areas near the western edge of the Sacramento Valley before reaching Winters. I-505 then skirts the eastern city limits 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 20 miles until it reaches its northern terminus with I-5 near Dunnigan.

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.
County Location Postmile
#[6] Destinations Notes
SOL R0.00-R10.63
Vacaville R0.00 1 I-80San Francisco, Sacramento Southbound exit and northbound entrance; signed as exits 1A (west) and 1B (east)
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
R10.62 10 Putah Creek Road
YOL 0.00-R22.36
0.40 11 SR 128 west (CR E6 east) – Winters, Davis
4.03 15 Road 29A
6.53 17 Road 27
10.62 21 SR 16Woodland, Esparto
13.43 24 Road 19
17.45 28 Road 14 (CR E10) – Zamora
20.13 31 Road 12A
R22.36 I-5 north – Redding Northbound exit and southbound entrance




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