Interstate 580 (California)
|Defined by S&HC § 618|
|Maintained by Caltrans|
|Length:||75.550 mi (121.586 km)
I-580 is broken into pieces, and the length does not reflect the I-80 overlap that would be required to make the route continuous.
|Existed:||August 7, 1947
July 1, 1964 by Caltrans – present
|West end:||US 101 in San Rafael|
| I-80 in Oakland
I-980 in Oakland
I-238 in Castro Valley
I-680 in Dublin
I-205 near Livermore
|East end:||I-5 near Tracy|
Interstate 580 (I-580) is an 80-mile (129 km) east–west Interstate Highway in Northern California. The heavily traveled spur route of Interstate 80 runs from San Rafael in the San Francisco Bay Area to Interstate 5 near Tracy in the Central Valley. It provides access from San Francisco to the southern San Joaquin Valley and Southern California.
A portion of I-580 is called the MacArthur Freeway, after General Douglas MacArthur. Other portions are named the John T. Knox Freeway (after a former California State Assemblyman and Speaker Pro Tempore who currently practices law at Nossaman LLP), the Eastshore Freeway (after its location on San Francisco Bay), the Arthur H. Breed Jr. Freeway (after a former California State Assemblyman and Senator), the William Elton "Brownie" Brown Freeway (after a Tracy resident instrumental in determining the route of Interstate 5 through the San Joaquin Valley), the Sgt. Daniel Sakai Memorial Highway (after the Castro Valley resident and Oakland SWAT officer killed in the 2009 shootings of Oakland police officers), and the John P. Miller Memorial Highway (after the Lodi resident and California Highway Patrol officer killed while chasing down a DUI driver).
Route description 
The western terminus of I-580 is north of San Francisco in San Rafael, at a junction with U.S. Route 101. The eastern terminus is with I-5 southeast of Tracy. Leaving San Rafael, I-580 runs next to the San Quentin State Prison before crossing San Francisco Bay over the Richmond-San Rafael Bridge. The road then passes through Richmond.
In Albany, I-580 joins I-80 and then turns east at the interchange known as the MacArthur Maze. From here, it is known as the MacArthur Freeway which runs through Oakland and San Leandro to Castro Valley. About halfway to Castro Valley from the Maze, is an interchange with the Warren Freeway (State Route 13). Between this interchange and Castro Valley, I-580 runs near or along the trace of the Hayward Fault, a major branch of the San Andreas Fault.
In Castro Valley, I-580 turns eastward toward Dublin Canyon before descending into Dublin and Pleasanton. After passing through Livermore, the freeway enters the Altamont Pass. The road emerges in the Central Valley west of Tracy, where, after Interstate 205 splits near the Altamont Speedway, it turns southeastward and terminates by merging with Interstate 5 south of Tracy.
I-580 provides Interstate Highway access between San Francisco and Los Angeles since Interstate 5 runs east of the Bay Area. However, the primary control city listed on freeway signs along eastbound 580 between I-80 and I-205 is instead Stockton, a vestige of when this segment used to be part of U.S. Route 50.
Truck ban through Oakland 
Trucks over 4.5 tons are prohibited through Oakland between Grand Avenue and the San Leandro border. Specifically, eastbound trucks cannot travel beyond the Grand Avenue/Lakeshore Avenue exit, and those going westbound must take the MacArthur Boulevard/Foothill Boulevard exit. They are instead instructed to take Interstate 238 and Interstate 880 as an alternative route through Oakland, 
The truck prohibition has been in effect since the freeway was built in 1963 as part of U.S. 50. Both the Federal Highway Administration (FHWA) and the California Department of Transportation (Caltrans) imposed the restriction, partly because the City of Oakland already had a truck ban through the area prior to the freeway's construction. Since then, the restriction was grandfathered in when the freeway was both renumbered and added to the Interstate Highway System.
As a result, it is one of the few segments along the Interstate Highway System that is not part of the National Truck Network. For decades, the trucking industry lobbied to have the ban removed, but was unsuccessful due to local opposition. In 2000, the California State Legislature passed Assembly Bill 500, adding the I-580 truck restriction into the California Vehicle Code. However, the California Highway Patrol has frequently allowed trucks through temporarily when major accidents occur on I-880 or I-238.
I-5 to Castro Valley 
For the most part, the I-580 freeway in this segment was constructed over or alongside the right-of-way of U.S. Route 50, previously part of the old Lincoln Highway, during the course of the late 1960s and early 1970s. The segment which begins at the split with I-205 was constructed during the same period of time over a new right-of-way to a junction with I-5, running through some low hills on the east side of the San Joaquin Valley near the city of Patterson.
In the 1990s, the freeway segment from Castro Valley through Pleasanton was enlarged and otherwise re-engineered in conjunction with the construction of the Dublin/Pleasanton Line of the Bay Area Rapid Transit. The BART tracks were placed in a new median between the westbound and eastbound lanes of I-580 as was the new Dublin/Pleasantion Station. The interchange with I-238 and the Hayward exit ramps was also re-engineered at this time.
The MacArthur Freeway: Castro Valley to Oakland 
The I-580 freeway in this segment was constructed in the 1960s adjacent to the city streets which were part of U.S. Route 50 between Castro Valley and the large interchange along the eastern approach to the San Francisco – Oakland Bay Bridge in Oakland now called the "MacArthur Maze". The freeway was named in honor of World War II General Douglas MacArthur. Some years prior to the construction of this freeway, the various city streets of Oakland (principally 38th Street, Hopkins Street, and part of Foothill Blvd.) had been named for the General as "MacArthur Boulevard" which, for the most part, still parallels the MacArthur Freeway.
Oakland to San Rafael 
The segment of I-580 running from the MacArthur Maze to San Rafael is the most recent to be signed as I-580, beginning in 1984. Before 1984, this segment was part of State Route 17.
From the Maze to the interchange locally known as the Hoffman Split in Albany, just north of the Gilman Street interchange, I-580 follows the Eastshore Freeway, a wrong-way concurrency with I-80 for its entirety: northward on the Eastshore is signed I-80 East and I-580 West; headed southward, one finds signs indicating I-80 West and I-580 East.
At the Hoffman Split, I-580 leaves the Eastshore Freeway in a northwesterly direction through the cities of El Cerrito and Richmond. It then crosses San Francisco Bay over the Richmond-San Rafael Bridge. The freeway in this section, officially named the John T. Knox Freeway, was constructed from 1987 to 1991. It replaced a number of city streets which comprised the earlier highway leading to the San Rafael Bridge, principally, Hoffman and Cutting Boulevards.
Interstate 180 
Interstate 180 was a temporary designation used in 1978 for the Richmond-San Rafael Bridge, now part of Interstate 580. At the time the bridge had been identified as part of State Route 17 but was marked for inclusion in the Interstate Highway System.
Briefly the bridge used the number 180, despite the Fresno-area State Route 180's use of the number. The California Streets and Highways Code has a policy against using one route number for multiple noncontiguous highways. Unless the existing Route 180 is renumbered, which is unlikely due to its familiarity as the road to Kings Canyon National Park, there will not be an Interstate 180 in California.
The segment of I-580 from I-680 to I-205 is undergoing significant improvements. Among the projects along this segment is the construction of high-occupancy vehicle lanes in each direction, a westbound auxiliary lane between Fallon Road and Tassajara Road, the construction of a new interchange at Isabel Avenue in Livermore, the reconstruction of several interchanges, the construction of additional truck climbing lanes for the eastward ascent to the Altamont Pass, and plans to preserve the right-of-way to accommodate a future BART extension in the median of the freeway.
There is a plan to add high-occupancy toll (HOT) lanes along I-580 between Pleasanton and Livermore. Under the plan, the 12-mile (19 km) stretch between Hacienda Drive and North Greenville Road would be modified to include HOT lanes. The eastbound HOT lane is scheduled to open in 2013, while the westbound HOT lane is scheduled to open in 2014. Solo drivers would then be required to use a FasTrak transponder.
Exit list 
||This section contains a table that is missing mileposts for one or more junctions. Please help by|
- 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. Although Interstate 580 is a west–east highway, postmiles are assigned south to north. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.
|San Rafael||4.78||1A||US 101 north – San Rafael, Santa Rosa||Westbound exit and eastbound entrance|
|4.50||1B||Francisco Boulevard to US 101 south – San Francisco||Signed as exit 1 eastbound|
|3.09||2A||Sir Francis Drake Boulevard||Westbound exit and eastbound entrance|
|2.48||2B||Francisco Boulevard – San Quentin||Signed as exit 2 eastbound|
|Marin – Contra Costa county line
||San Rafael – Richmond line||Richmond – San Rafael Bridge over San Francisco Bay|
|Richmond||6.01||7A||Western Drive – Point Molate||No eastbound exit|
|R5.43||7B||Richmond Parkway to I-80 east – Port Richmond, Sacramento||Signed as exit 7 eastbound|
|R4.64||8||Canal Boulevard, Garrard Boulevard|
|R3.60||9||Cutting Boulevard, Harbour Way||Signed as exits 9A (Cutting Boulevard, Harbour Way south) and 9B (Harbour Way north) westbound|
|R2.89||10A||Marina Bay Parkway, South 23rd Street|
|Albany||13||Buchanan Street – Albany||Signed as exit 13A westbound|
|I-80 east (Eastshore Freeway) – Vallejo, Sacramento||West end of I-80 overlap; westbound exit and eastbound entrance|
|Berkeley||6.62[N 1]||12||Gilman Street|
|5.82[N 1]||11||University Avenue – Berkeley|
|4.58[N 1]||10||SR 13 south (Ashby Avenue) / Shellmound Street||Shellmound Street accessible only from westbound I-580 / eastbound I-80|
|Emeryville||3.79[N 1]||9||Powell Street – Emeryville|
|19A||I-80 west (Bay Bridge) – San Francisco||East end of I-80 overlap; no exit number eastbound|
|46.46||I-880 south (Nimitz Freeway) / West Grand Avenue – Alameda, San Jose||Eastbound exit and westbound entrance|
|46.01||19A||MacArthur Boulevard||Eastbound left exit and westbound entrance|
|46.01||19B||SR 123 north (San Pablo Avenue) / West Street||Westbound exit and eastbound entrance|
|45.15||19C||SR 24 east (Grove-Shafter Freeway) – Berkeley, Walnut Creek||Signed as exit 19B eastbound|
|45.15||19D||I-980 west (Grove-Shafter Freeway) to I-880 – Downtown Oakland||Signed as exit 19C eastbound|
|44.51||20||Webster Street, Broadway-Auto Row||Eastbound exit only|
|44.28||21A||Harrison Street, Oakland Avenue, MacArthur Boulevard|
|43.48||22A||Lake Shore Avenue||Eastbound exit is via exit 21B|
|22B||Park Boulevard, 14th Avenue||Signed as exit 22 eastbound|
|R41.43||23||Fruitvale Avenue, Coolidge Avenue||Signed as exit 24 westbound|
|R40.65||24||35th Avenue||Eastbound exit and westbound entrance|
|R40.08||25A||High Street||Westbound exit is via exit 25|
|R39.91||25B||MacArthur Boulevard||Signed as exit 25 westbound|
|R39.24||26A||SR 13 north (Warren Freeway) – Berkeley||Eastbound exit is via exit 26|
|R38.92||26B||Seminary Avenue||Signed as exit 26 eastbound|
|R38.31||27A||Edwards Avenue||Eastbound exit and westbound entrance|
|R37.80||27B||Keller Avenue, Mountain Boulevard||Signed as exit 27 westbound|
|R36.34||29A||Golf Links Road, 98th Avenue||Signed as exit 29 westbound|
|Oakland–San Leandro line||R35.71||29B||106th Avenue, Foothill Boulevard||Eastbound exit and westbound entrance|
|R35.11||30||MacArthur Boulevard, Foothill Boulevard||Westbound exit and eastbound entrance|
|R34.48||31A||Dutton Avenue, Estudillo Avenue – Downtown San Leandro||Signed as exit 31 westbound|
|San Leandro||R33.94||31B||Grand Avenue – Downtown San Leandro||Eastbound exit and westbound entrance|
|R33.43||32A||Benedict Drive||Westbound exit only|
|32B||150th Avenue, Fairmont Drive||Signed as exit 32 eastbound|
|R31.71||33||164th Avenue, Miramar Avenue, Carolyn Street|
|Castro Valley||R30.81||34||I-238 north to I-880||Left exit westbound|
|R30.81||34||SR 238 south – Hayward||Eastbound exit and westbound entrance|
|R29.37||36A||Redwood Road – Castro Valley|
|R28.75||36B||Grove Way – Castro Valley|
|R26.23||39||Eden Canyon Road, Palomares Road|
|Pleasanton–Dublin line||R21.43||44A||San Ramon Road, Foothill Road – Dublin|
|20.73||44B||I-680 – Sacramento, San Jose|
|19.86||45||Hopyard Road, Dougherty Road|
|18.82||46||Hacienda Drive, Dublin Boulevard|
|17.95||47||Santa Rita Road, Tassajara Road|
|Dublin||16.70||48||El Charro Road, Fallon Road|
|Livermore||14.98||50||Airway Boulevard, Collier Canyon Road|
|51||SR 84 (Isabel Avenue) / Portola Avenue|
|13.22||52A||Portola Avenue||Closed; former eastbound exit and westbound entrance|
|12.53||52B||North Livermore Avenue – Downtown Livermore||Signed as exit 52 westbound|
|10.69||54||First Street, Springtown Boulevard||Former SR 84|
|9.68||55||Vasco Road – Brentwood|
|R8.27||57||North Greenville Road, Altamont Pass Road, Laughlin Road|
|R5.98||59||North Flynn Road|
|R1.48||63||Grant Line Road – Byron|
|0.42||65||I-205 east – Tracy, Stockton||Eastbound left exit and westbound entrance|
|13.54||67||Mountain House Parkway, Patterson Pass Road|
|Tracy||8.15||72||Corral Hollow Road|
|4.34||76||SR 132 east – Modesto||Westbound exit is via exit 76|
|4.02||76||Chrisman Road – Tracy||Westbound exit and eastbound entrance|
|0.00||I-5 south – Fresno, Los Angeles||Eastbound exit and westbound entrance|
- Indicates that the postmile represents the distance along I-80 rather than I-580.
|Wikimedia Commons has media related to: Interstate 580 (California)|
- "California Highways: Interstate Highway Types and the History of California's Interstates". Cahighways.org. Retrieved 2013-01-26.
- "California Highways: Interstate 580". Cahighways.org. Retrieved 2013-01-26.
- California Department of Transportation, State Truck Route List[dead link] (XLS file), accessed February 2008
- "CA Codes (shc:250-257)". Leginfo.ca.gov. Retrieved 2013-01-26.
- "CA Codes (shc:260-284)". Leginfo.ca.gov. Retrieved 2013-01-26.
- Interstate 580 Truck Restriction History[dead link], Caltrans.
- California Department of Transportation, Log of Bridges on State Highways, July 2007
- Corbett. "California Assembly Bill 500". Leginfo.ca.gov. Retrieved 2013-01-26.
- "I-580 Corridor Improvements: Project List". Retrieved 2009-03-02.
- "Alameda County ExpressLanes". Retrieved 2012-03-31.
- California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
- California Department of Transportation, California Numbered Exit Uniform System, I-580 Eastbound and I-580 Westbound, accessed February 2008