Interstate 80 in California
|Defined by S&HC § 380|
|Maintained by Caltrans|
|Length:||207.554 mi (334.026 km)|
|Existed:||August 7, 1947 by FHWA
June 26, 1956
July 1, 1964 by Caltrans – present
|West end:||US 101 in San Francisco|
| I-580 / I-880 in Oakland
I-780 in Vallejo
I-680 in Fairfield
I-505 in Vacaville
US 50 / I-80 Bus. in West Sacramento
I-5 / SR 16 / SR 99 in Sacramento
|East end:||I-80 at Nevada state line|
In the U.S. state of California, Interstate 80 (I-80), a major east–west route of the Interstate Highway System, has its western terminus (ending point) 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 before turning back northeast through the Sacramento Valley. I-80 then goes northeast and east over the Sierra Nevada mountain range before crossing into the state of Nevada within the Truckee (River) Canyon. The speed limit is 65 miles per hour instead of the state's maximum of 70 since the road passes exclusively through urban and mountainous areas in California.
Interstate 80 has portions designated as either the San Francisco Skyway, Eastshore Freeway, or Roseville Freeway.
Route description 
I-80 is recognized as the Dwight D. Eisenhower Highway and a Blue Star Memorial Highway for its entire length. It was part of the Lincoln Highway from Sacramento to Reno (except in vicinity of Donner Summit). I-80 is also known as the Kent D. Pursel Memorial Freeway from the Bay Bridge to the Alameda/Contra Costa County line, the Linus F. Claeys Freeway from SR 4 to the Carquinez Bridge, the Alan S. Hart Freeway from the Sacramento/Placer County line to the Nevada state line, and the Dutch Flat and Donner Lake Wagon Road from Emigrant Gap to Donner Lake (except in vicinity of Donner Summit).
West end in San Francisco 
According to the California State Highway system, I-80 begins at its intersection with U.S. Route 101 in San Francisco. However, the San Francisco Skyway (officially known to Caltrans as the Bayshore Viaduct), the elevated freeway that runs from this junction of the James Lick Freeway and the Central Freeway to the Western Approach of the San Francisco – Oakland Bay Bridge at 4th Street, may not be officially part of the Interstate Highway System, although it is consistently shown as I-80 on most maps of San Francisco. The Interstate designation is interpreted by some to actually beginning on the Bay Bridge approach itself, at the location of the Fremont Street off-ramp (previously known as the Terminal Separator Structure (TSS) that once connected it to the Embarcadero Freeway). Thus, the first 1.20 miles (1.93 km) of the signed Interstate may not be officially an actual Interstate.
When I-80 was first approved, it was to begin at planned I-280 (CA 1) in Golden Gate Park, head east on the never-built Panhandle Freeway, then run south and southeast on the Central Freeway (US 101) to the San Francisco Skyway. A January 1968 amendment moved I-280 to its present alignment, removed Interstate 480, and truncated the origin point of I-80 to the Embarcadero Freeway (then I-280, formerly I-480). These changes were made on the state level later that year, but Route 80 was only truncated to US 101. (The Central Freeway remained part of US 101, and the Panhandle Freeway became State Route 241. The Panhandle Freeway was later cancelled in the wake of the Freeway Revolts, and the State Route 241 designation has since been reassigned to an unrelated stretch of highway in Orange County) The San Francisco Skyway, which had already been signed as part of I-80, has remained a de facto section of Interstate 80 to the present day and remains listed as part of Interstate 80 in California.
Eastshore Freeway 
The Eastshore Freeway is a segment of Interstates 80 and 580 along the northeast shoreline of San Francisco Bay in northern California. It begins at the Carquinez Bridge and ends at the MacArthur Maze interchange just east of the eastern end of the San Francisco – Oakland Bay Bridge. Interstate 580 joins the Eastshore Freeway at an interchange in Albany. The section of the Eastshore Freeway between the MacArthur Maze and the 580 split in Albany is a wrong-way concurrency where the northbound direction is signed as I-80 east and I-580 west, while the southbound direction is signed as I-80 west and I-580 east.
The Eastshore Freeway was created in the mid 1950s (construction commenced in 1954) by re-engineering the Eastshore Highway, a thoroughfare constructed in the 1930s (1937–39) as one of the approaches to the Bay Bridge and designated as part of U.S. Route 40. The Eastshore Highway began in El Cerrito at an intersection with San Pablo Avenue at Hill Street between Potrero Avenue and Cutting Blvd., adjacent to the location today of the El Cerrito Del Norte station of BART. It was not a freeway in that access was at intersections with adjoining streets rather than by ramps. The Eastshore Highway ran from El Cerrito to the Bay Bridge along the same routing as today's freeway, although it was much narrower. A causeway was constructed for this purpose by filling in part of the mudflats along the bayshore. In the stretch from University to Ashby Avenues in Berkeley, this resulted in the creation of an artificial lagoon which was developed by the WPA in the late 1930s as "Aquatic Park".
The frontage road along the east side of today's Eastshore Freeway between Buchanan Street in Albany and Hearst Avenue in Berkeley retains the name "Eastshore Highway". The terminal segment of the old Eastshore Highway in El Cerrito between Potrero and San Pablo Avenues is today named "Eastshore Blvd.".
Originally, the name "Eastshore Freeway" was applied first to what is today known as the "Nimitz Freeway" (I-880) upon its construction in 1947. This freeway was dedicated in 1958 to Admiral Nimitz, and so for a few years in the 1950s prior, the Eastshore Freeway stretched the entire length of the east shore of San Francisco Bay. (Caltrans still shows this in its current highway name book referenced below - see p.16, p.28 of PDF) Until the late 1960s, the Eastshore Freeway was also designated as part of State Highway 17 together with the Nimitz.
The Eastshore Freeway was officially renamed the "Kent D. Pursel Memorial Freeway" in 1968, but it is hardly recognized as such by the public. The maps of the California State Automobile Association (CSAA), for instance, still show the name "Eastshore Freeway".
The interchange where I-580 joins I-80 is still known locally as the "Hoffman Split", an allusion to the time before the I-580 freeway replaced Hoffman Blvd. as the highway leading to the Richmond-San Rafael Bridge. The same interchange today also serves the Buchanan Street exit in Albany.
The section of the Eastshore Freeway between the MacArthur Maze and the 80/580 split suffers from severe traffic congestion during rush hour due to the merger of three freeways (Interstate 80, Interstate 580, and Interstate 880) at the MacArthur Maze.
Sacramento portion 
Legislative Route 242 was defined in 1957, connecting pre-1964 Legislative Route 6 west of Sacramento to pre-1964 Legislative Route 3 northeast of Sacramento. Interstate 880, a bypass of I-80, was approved along Legislative Route 242 by the American Association of State Highway Officials on November 10, 1958. The Route 880 designation was adopted by the state in the 1964 renumbering; the bypass was completed in 1972.
Interstate 80 has run north of Sacramento on the Beltline Freeway which was originally Interstate 880, a bypass freeway. The I-80 routing alignment was moved from a route through Sacramento, now Interstate 80 Business, after the proposed Interstate 80 replacement of the North Sacramento Freeway was cancelled. The Beltline Freeway runs northeast from the junction of I-80 and I-80 Business (U.S. Route 50 there) in West Sacramento across Interstate 5 to its junction northeast of Sacramento with I-80 Business (which is State Route 51). State Route 244 heads east as a short freeway spur from that interchange.
Sierra Nevada portion 
Crossing the Sierra Nevada, I-80 regularly gets snow at higher elevations from fall to spring. Caltrans sometimes requires vehicles to use snow tires, snow chains or other traction devices in the mountains during and after snowstorms. Checkpoints are often set up to enforce chain restrictions on vehicles bound for icy or snowy areas. When chain restrictions are in effect vehicles must have chains on the driving wheels, except 4WD vehicles with snow tires.
I-80 crosses the Sierra Nevada crest at Donner Summit (also known as Euer Saddle) at an elevation of 7,239 feet (2,206 m) westbound and 7,227 feet (2,203 m) eastbound. The summit is located in Nevada County, California. The pass is generally open year-round; it is plowed in winter, but may temporarily close during the worst snowstorms. The older, original Lincoln Highway route (Historical U.S. 40) over Donner Pass is about two miles (3 km) to the south; this highway was replaced as the official trans-Sierra route by I-80 in 1964. Although the current Donner Pass is lower, Euer Saddle was chosen for the interstate because of more gradual approaches.
An eastern span replacement of the San Francisco–Oakland Bay Bridge, which will consists of a self-anchored suspension tower is scheduled to be completed in 2013. The current eastern span has been the subject of concern ever since a section collapsed during the Loma Prieta earthquake on October 17, 1989. After much debate, construction for the replacement span began in 2002.
Portions of I-80 through the Sierra-Nevada mountain range are in rough condition. The concrete road surface is badly cracked and eroded due to severe weather that occurs in the area and a result of an outdated concrete paving system of the 1950s and 1960s where the concrete was poured in 40 foot sections, as compared to a monolithic pour, (as is used in today's road construction). All the older concrete highways across the nation also suffer from this. Work is underway to fix the driving lanes.
Exit list 
Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, and do not necessarily reflect current mileage. R reflects a realignment in the route since then. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.
|3.95||1||US 101 – San Jose, Golden Gate Bridge||Westbound exit and eastbound entrance; signed as exits 1A (south) and 1B (north)|
|1C||Ninth Street – San Francisco Civic Center||Signed as exit 433C on US 101 northbound|
|4.40||1||Seventh Street||Eastbound exit and westbound entrance|
|5.45||2A||Fifth Street||Westbound exit and eastbound entrance|
|5.45||2B||Fourth Street, Embarcadero||Eastbound exit and westbound entrance|
|5.59||2C||Harrison Street, Embarcadero||Westbound exit and eastbound entrance; former SR 480|
|5.59||2D||Fremont Street, Folsom Street||Westbound exit and eastbound entrance; former SR 480|
|San Francisco–Oakland Bay Bridge (west span) over San Francisco Bay|
|7.72||4A||Treasure Island, Yerba Buena Island||Eastbound exit and westbound entrance only; westbound exit and eastbound entrance are via exit 4/4B|
|7.72||4B||Yerba Buena Island||Signed as exit 4 westbound; eastbound exit and westbound entrance currently closed due to construction of new eastern span|
|San Francisco–Oakland Bay Bridge (east span) over San Francisco Bay|
|Oakland||2.51||8A||West Grand Avenue, Maritime Street|
|2.80||8A||I-880 south (Nimitz Freeway) – Alameda, San Jose||Westbound exit is part of exit 8B|
|2.80||8B||I-580 east (MacArthur Freeway) to SR 24 – Downtown Oakland, Hayward, Stockton||West end of I-580 overlap; westbound exit and eastbound entrance|
|Emeryville||3.79||9||Powell Street – Emeryville||No eastbound exit from I-880 north|
|Berkeley||4.58||10||SR 13 (Ashby Avenue) / Shellmound Street||Shellmound Street accessible eastbound only|
|5.82||11||University Avenue – Berkeley||Serves UC Berkeley|
|Albany||R7.30||13A||Buchanan Street – Albany||Signed as exit 13 westbound|
|R7.30||13B||I-580 west – Point Richmond, San Rafael||Eastbound exit and westbound entrance; east end of I-580 overlap|
|Pierce Street||Former eastbound exit and entrance; demolished as part of reconstruction of I-80 / I-580 interchange in Albany|
|Richmond||0.22||14A||Central Avenue – El Cerrito|
|El Cerrito||1.67||15||Potrero Avenue||Eastbound exit and westbound entrance|
|Richmond||2.04||15||SR 123 (Cutting Boulevard)||Westbound exit and eastbound entrance|
|2.62||16A||MacDonald Avenue||Eastbound exit and westbound entrance|
|2.96||16B||San Pablo Avenue, Barrett Avenue||Signed as exit 16 westbound; Barrett Avenue formerly signed as Central Richmond|
|3.41||17||Solano Avenue||Eastbound exit and westbound entrance|
|3.80||17||McBryde Avenue||Westbound exit only|
|San Pablo||4.34||18||San Pablo Dam Road|
|5.25||19A||El Portal Drive|
|Richmond||5.98||19B||Hilltop Mall, Auto Plaza||Formerly signed as Hilltop Drive|
|Pinole||6.60||20||Richmond Parkway, Fitzgerald Drive to I-580 west||Unconstructed SR 93|
|8.51||22||Pinole Valley Road|
|Hercules||10.06||23||SR 4 east – Stockton||No westbound exit|
|10.69||24||Willow Avenue – Rodeo|
|12.75||26||Cummings Skyway to SR 4 east – Martinez, Concord|
|13.49||27||Pomona Street – Crockett, Port Costa|
|Vallejo||14.14||Carquinez Bridge over Carquinez Strait|
|1.14||29A||SR 29 (Sonoma Boulevard)||Eastbound exit and westbound entrance|
|29A||Maritime Academy Drive||Westbound exit and entrance|
|29B||Sequoia Avenue||Eastbound exit only|
|1.78||29C||Magazine Street||Signed as exit 29B westbound|
|2.23||30A||I-780 to I-680 / Curtola Parkway – Benicia, Martinez||Former I-680 south|
|2.44||30B||Frontage Road (to Benicia Road)||Eastbound exit only; former SR 141|
|2.88||30C||Georgia Street – Central Vallejo||Signed as exit 30B westbound|
|3.23||31A||Springs Road, Solano Avenue|
|3.49||31B||Tennessee Street – Mare Island|
|4.43||32A||Redwood Parkway, Redwood Street||Signed as exits 32A (east) and 32B (west) eastbound|
|5.63||33||SR 37 west / Auto Mall Columbus Parkway – Napa, San Rafael, Novato||Signed as exits 33A (Auto Mall Columbus Parkway) and 33B (SR 37) westbound|
|No major junctions|
|8.10||36||American Canyon Road, Hiddenbrooke Parkway|
|Fairfield||R11.39||39A||Red Top Road||Signed as exit 39 eastbound|
|R11.98||39B||SR 12 west – Napa, Sonoma||West end of SR 12 overlap; eastbound exit is via exit 39|
|12.74||40||Green Valley Road||Westbound exit is part of exit 41|
|12.84||40||I-680 south – Benicia, Martinez, San Jose||Former SR 21|
|13.49||41||Suisun Valley Road, Pittman Road|
|15.82||43||SR 12 east – Suisun City, Rio Vista||East end of SR 12 overlap; westbound exit is via exit 43|
|16.17||44A||Abernathy Road, Suisun Parkway||Signed as exit 43 westbound|
|17.20||44B||West Texas Street, Rockville Road – Fairfield||Signed as exit 44 westbound|
|19.18||47||Waterman Boulevard, Air Base Parkway – Travis AFB||Signed as exits 47A (Air Base Parkway) and 47B (Waterman Boulevard) westbound|
|20.93||48||North Texas Street, Manuel Campos Parkway – Fairfield|
|23.13||51A||Lagoon Valley Road, Cherry Glen Road|
|Vacaville||23.96||51B||Peña Adobe Road|
|52||Cherry Glen Road||Westbound exit only|
|R25.31||53||Alamo Drive, Merchant Street|
|R26.46||54B||Peabody Road, Mason Street – Elmira|
|R27.24||55||Monte Vista Avenue, Allison Drive, Nut Tree Parkway|
|R28.36||56||I-505 north – Winters, Redding|
|29.86||57||Leisure Town Road, Vaca Valley Parkway|
|31.36||59||Meridian Road, Weber Road|
|32.62||60||Midway Road, Lewis Road|
|Dixon||35.55||63||Dixon Avenue, West A Street – Dixon|
|36.90||64||Pitt School Road|
|38.21||66A||SR 113 south (First Street) / Currey Road – Dixon||West end of SR 113 overlap; signed as exit 66 eastbound|
|66B||Milk Farm Road||Westbound exit only|
|39.74||67||Pedrick Road (CR E7)|
|42.67||70||SR 113 north (Vic Fazio Highway) – Woodland||East end of SR 113 overlap|
|43.50||71||UC Davis (Old Davis Road)|
|Davis||0.24||72||Richards Boulevard – Downtown Davis||Signed as exits 72A (south) and 72B (north) westbound|
|0.84||73||Olive Drive||Westbound exit only; former US 40 west / US 99W north|
|2.68||75||Mace Boulevard (CR E6)|
|5.78||78||Road 32A, East Chiles Road|
|Yolo Causeway over Yolo Bypass|
|West Sacramento||9.18||81||West Capitol Avenue, Enterprise Boulevard – West Sacramento||West Capitol Avenue was former US 40 east / US 99W south|
|R9.91||82||I-80 Bus. east (Capital City Freeway) / US 50 east (El Dorado Freeway) – Sacramento, South Lake Tahoe||Former US 40 east / US 99W south / I-80 east|
|R11.23||83||Reed Avenue (SR 84) – West Sacramento|
|Sacramento||M1.36||85||West El Camino Avenue|
|M2.55||86||I-5 / SR 16 / SR 99 – Sacramento, Los Angeles, Redding|
|M3.64||88||Truxel Road||Serves Power Balance Pavilion|
|M7.63||91||Raley Boulevard, Marysville Boulevard – Del Paso Heights|
|94||Light Rail Stations (Roseville Road, Watt/I-80 West, and Watt/I-80)||Westbound left exit and eastbound left entrance; also accessible as part of exit 93 westbound|
|M10.36||94A||Watt Avenue||Westbound exit is part of exit 95|
|R10.99||94B||Auburn Boulevard (SR 244)||Westbound exit is part of exit 95|
|R10.99||95||I-80 Bus. west (Capital City Freeway) to SR 99 south – Sacramento||Westbound exit and eastbound entrance; eastbound exit is part of exit 94A; former I-80 west|
|14.45||98||Greenback Lane, Elkhorn Boulevard (CR E14)|
|Citrus Heights||16.69||100||Antelope Road|
|Roseville||0.27||102||Riverside Avenue, Auburn Boulevard – Roseville, Citrus Heights||Former US 40 / SR 65|
|1.98||103||Douglas Boulevard, Sunrise Avenue (CR E2)||Signed as exits 103A (east) and 103B (west) eastbound|
|3.07||105A||Atlantic Street, Eureka Road||Signed as exits 105A (Eureka Road) and 105B (Atlantic Street) westbound|
|3.66||105B||Taylor Road, Pacific Street||Westbound exit is via exit 105A|
|4.16||106||SR 65 – Lincoln, Marysville|
|7.42||109||Sierra College Boulevard (CR E3)|
|Loomis||8.72||110||Horseshoe Bar Road – Loomis|
|10.35||112||Penryn Road – Penryn|
|13.81||115||Newcastle Road – Newcastle|
|14.30||116||SR 193 west – Lincoln||West end of SR 193 overlap|
|Auburn||16.85||118||Ophir Road||Westbound exit and eastbound entrance|
|17.29||119A||Maple Street, Nevada Street – Auburn|
|17.54||119B||SR 49 (SR 193 east) – Grass Valley, Placerville||East end of SR 193 overlap|
|R18.91||120||Lincoln Way, Russell Road||No eastbound entrance|
|R19.47||121||Auburn Ravine Road – Foresthill|
|R22.21||124||Dry Creek Road|
|R23.43||125||Clipper Gap, Meadow Vista (Placer Hills Road)|
|28.59||130||West Paoli Lane|
|29.32||131||Weimar Cross Road|
|Colfax||31.79||133||Canyon Way, Placer Hills Road|
|33.13||135||SR 174 – Colfax, Grass Valley|
|37.78||139||Rollins Lake Road, Magra Road||Westbound exit and entrance|
|38.35||140||Secret Town Road, Magra Road|
|41.37||143||Magra Road – Gold Run|
|42.19||144||Gold Run||Westbound exit and eastbound entrance|
|49.00||150||Drum Forebay Road|
|R56.06||158A||Emigrant Gap||Signed as exit 158 westbound|
|158B||Laing Road||Eastbound exit only|
|R59.54||161||SR 20 west – Nevada City, Grass Valley|
|R62.03||164||Eagle Lakes Road|
|R63.52||165||Cisco Grove (Cisco Road)|
|166||Big Bend||Eastbound exit only|
|R66.20||168||Rainbow Road – Big Bend|
|R2.48||174||Soda Springs, Norden|
|R5.07||176||Boreal Ridge Road – Castle Peak|
|R9.01||180||Donner Lake (Donner Lake Road)|
|13.21||184||Donner Pass Road|
|14.16||185||SR 89 south – Tahoe City, Lake Tahoe, Squaw Valley||West end of SR 89 overlap|
|Truckee||14.97||186||Central Truckee||No eastbound entrance|
|16.29||188A||Truckee||Eastbound exit and westbound entrance|
|16.60||188B||SR 89 north / SR 267 south – Sierraville, Lake Tahoe||East end of SR 89 overlap; signed as exit 188 westbound|
|20.03||Agricultural Inspection||Westbound only|
|No major junctions|
|1.59||Nevada state line|
See also 
- "California Highways: Interstate Highway Types and the History of California's Interstates". Cahighways.org. Retrieved 2013-01-26.
- "California Highways: Interstate 80". Cahighways.org. Retrieved 2013-01-26.
- California Department of Transportation, State Truck Route List[dead link] (XLS file), accessed February 2008
- 2008 Named Freeways, Highways, Structures and Other Appurtenances in California (PDF). Caltrans. pp. 34–36. Retrieved 2009-04-01.
- Federal Highway Administration, National Highway System: San Francisco--Oakland CA[dead link], April 2004
- California Department of Transportation, California Road System (CRS) Maps, accessed November 2007
- "City of Emeryville, CA - Official Website - Emeryville Comes of Age – 1930s to 1960s". Emeryville, California. ci.emeryville.ca.us. Retrieved 21 July 2010.
- "2009 Named Freeways, Highways, Structures and Other Appurtenances in California". California Department of Transportation. dot.ca.gov. January 2010. p. 209. Retrieved 21 July 2010.
- "California Highways: Legislative Route 242". Cahighways.org. Retrieved 2013-01-26.
- California Department of Transportation (2007). "Chain Controls". Retrieved 2010-09-03.
- California Department of Transportation (2007). "Winter Operations". Retrieved 2010-09-03.
- Elevation and Location of Summits and Passes in California[dead link]
- California Department of Transportation. "Get Across I-80". Retrieved 2010-09-03.[dead link]
- California Department of Transportation (2010). "Log of Bridges on State Highways". Retrieved 2010-09-03.
- California Department of Transportation. "All Traffic Volumes on CSHS". Retrieved 2013-01-26.
- California Department of Transportation, California Numbered Exit Uniform System, I-80, accessed February 2008
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