Interstate 80 in California

Interstate 80
Interstate 80
Dwight D. Eisenhower Highway
	I-80 highlighted in red
Route information
	Maintained by Caltrans
Length	205.07 mi (330.03 km) 199.24 miles (320.65 km) per FHWA
Existed	July 1, 1964–present
Tourist; routes	Yuba-Donner Scenic Byway
NHS	Entire route
Restrictions	No flammable tank vehicles or explosives on the Bay Bridge
Major junctions
West end	US 101 in San Francisco
	I-580 / I-880 in Oakland; SR 4 in Hercules; I-780 in Vallejo; I-680 in Fairfield; I-505 in Vacaville; US 50 / I-80 BL in West Sacramento; I-5 / SR 99 in Sacramento; I-80 BL in Sacramento; SR 49 in Auburn; SR 89 / SR 267 in Truckee;
East end	I-80 at Nevada state line near Verdi, NV
Location
Country	United States
State	California
Counties	San Francisco, Alameda, Contra Costa, Solano, Napa, Yolo, Sacramento, Placer, Nevada, Sierra
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future; State highways in California; Interstate; US; State; Scenic; History; Pre‑1964; Unconstructed; Deleted; Freeways;

Interstate 80 (I-80) is a transcontinental Interstate Highway in the United States, stretching from San Francisco, California, to Teaneck, New Jersey. The segment of I-80 in California runs east from San Francisco across the San Francisco–Oakland Bay Bridge to Oakland, where it turns north and crosses the Carquinez Bridge before turning back northeast through the Sacramento Valley. I-80 then traverses the Sierra Nevada, cresting at Donner Summit, before crossing into the state of Nevada within the Truckee River Canyon. The speed limit is at most 65 mph (105 km/h) along the entire route instead of the state's maximum of 70 mph (110 km/h) as most of the route is in either urban areas or mountainous terrain. I-80 has portions designated as the Eastshore Freeway and Alan S. Hart Freeway.

Throughout California, I-80 was built along the corridor of US Route 40 (US 40), eventually replacing this designation entirely. The prior US 40 corridor itself was built along several historic corridors in California, notably the California Trail and Lincoln Highway. The route has changed from the original plans in San Francisco due to freeway revolts canceling segments of the originally planned alignment. Similarly in Sacramento, the freeway was rerouted around the city after plans to upgrade the original grandfathered route through the city to Interstate Highway standards were canceled.

^ ^a ^b "Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. December 31, 2021. Retrieved June 9, 2022.
^ Cite error: The named reference calnexus was invoked but never defined (see the help page).
^ Faigin, Daniel P. "Routes 73 through 80: Interstate 80". California Highways. Retrieved January 26, 2013.^{[self-published source]}
^ "Truck Networks on California State Highways: District 4" (PDF). California Department of Transportation. May 1, 2015. Retrieved May 3, 2016.

[FHWA-1] "Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. December 31, 2021. Retrieved June 9, 2022.

[calnexus-2] Cite error: The named reference calnexus was invoked but never defined (see the help page).

[cah_80-3] Faigin, Daniel P. "Routes 73 through 80: Interstate 80". California Highways. Retrieved January 26, 2013.^{[self-published source]}

[4] "Truck Networks on California State Highways: District 4" (PDF). California Department of Transportation. May 1, 2015. Retrieved May 3, 2016.

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