Interstate 505

Interstate 505 (I-505) is a north–south auxiliary Interstate Highway in the Sacramento Valley in Northern California. It is a spur auxiliary route of I-5 that runs from near Dunnigan south to I-80 in Vacaville. 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 and the northern Sacramento Valley, bypassing Sacramento 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.

Interstate 505
I-505 highlighted in red
Route information
Auxiliary route of I-5
Defined by Streets and Highways Code § 617
Maintained by Caltrans
Length32.99 mi[1] (53.09 km)
Existed1977–present
Major junctions
South end I-80 in Vacaville
 
North end I-5 near Dunnigan
Location
CountiesSolano, Yolo
Highway system
← SR 480I-580 →

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.

I-505 is part of the California Freeway and Expressway System,[2] and is part of the National Highway System,[3] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[4]

History

What is now I-505 was originally conceived as part of a loop Interstate with a directional suffix, I-5W.[5] 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 and I-69 segments I-69W, I-69C and I-69E in southern Texas. The former route of I-5W now corresponds to I-580 from I-5 south of Tracy to Oakland, I-80 from Oakland to Vacaville, and I-505 from Vacaville to I-5 near Dunnigan.

Exit list
CountyLocationmi
[6]		kmExit
[6]		DestinationsNotes
SolanoVacaville0.000.001 I-80 – San Francisco, SacramentoSouthern terminus; southbound exit and northbound entrance; signed as exit 1A (west) and 1B (east); I-80 exit 56
0.000.00Orange Drive / Nut Tree RoadNorthbound exit (from I-80 east) and entrance
0.000.001BMonte Vista AvenueSouthbound exit and entrance (to I-80 east)
1.452.331CVaca Valley ParkwaySigned as exit 1 northbound
3.064.923Midway Road
​5.578.966Allendale Road
​10.4316.7910Putah Creek Road
Yolo​11.0317.7511 SR 128 west / CR E6 east – Winters, DavisEastern terminus of SR 128; western terminus of CR E6
​14.6623.5915Road 29A
​17.1627.6217Road 27
​21.2534.2021 SR 16 – Woodland, Esparto
​24.0638.7224Road 19
​28.0845.1928 CR E10 (Road 14) – Zamora
​30.7449.4731Road 12A
​32.9953.09 I-5 north – ReddingNorthern terminus; northbound exit and southbound entrance; I-5 south exit 553
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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gollark: This isn't solipsism, the other people exist but are lizards.
gollark: ... unless EVERYONE ELSE ON THE PLANET IS A LIZARD! AAAAAAAAAAAAAAAAAAAAAA!
gollark: Then people will do the same thing and notice that they're wrong.
gollark: <@!330678593904443393> Well, the thing with *scientifically investigated things* is that you can in theory test them and not rely on the word of some person 2000 years ago.

See also
  •  California Roads portal

References
  1. California Department of Transportation (October 2014). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
  2. "Article 2 of Chapter 2 of Division 1 of the California Streets and Highways Code". Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
  3. Federal Highway Administration (March 25, 2015). National Highway System: California (North) (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved July 29, 2017.
  4. Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012.
  5. "California Highways-Routes 1-8". California Highways. Retrieved September 3, 2012.
  6. California Department of Transportation, California Numbered Exit Uniform System, Interstate 505 Freeway Interchanges, Retrieved on 2009-02-07.

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