California State Route 4 - Major Intersections

Major Intersections

This table reflects the transfer of the State Route 4 Bypass to Caltrans in 2012. Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, 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
 Exit
 Destinations Notes
Contra Costa
 Hercules 0.00 1A San Pablo Avenue At-grade intersection; former US 40
0.00 1B I-80 (Eastshore Freeway) – Oakland, San Francisco, Sacramento No exit number eastbound
0.78 1C Willow Avenue Westbound exit and eastbound entrance
R1.70 1 Sycamore Avenue Eastbound exit and entrance
East end of freeway
R1.70 Claeys Lane Interchange; westbound exit and entrance
2.70 3 Franklin Canyon At-grade intersection eastbound; interchange westbound
West end of freeway
T4.89 5 Cummings Skyway to I-80 east – Crockett, Port Costa, Vallejo
R5.17 6 McEwen Road – Port Costa Westbound exit and eastbound entrance
Martinez R8.55 9 Alhambra Avenue – Martinez
R9.19 10 Pine Street, Center Avenue
R10.33 11 Morello Avenue, Glacier Drive
12.41 12A Pacheco Boulevard – Pacheco Former SR 21
12.67 12 I-680 – Benicia, Sacramento, Walnut Creek, San Jose Signed as exits 12B (south) and 12C (north)
R13.65 13 Solano Way
Concord R14.67 15A SR 242 – Concord, Oakland
R15.42 15B Port Chicago Highway
R16.83 17 Willow Pass Road
R18.83 19 San Marco Boulevard, Willow Pass Road – Bay Point
R20.10 20 Bailey Road Signed as exits 20A (south) and 20B (north)
Pittsburg 23.05 23 Railroad Avenue, Harbor Street
24.32 24 Loveridge Road – Pittsburg
Antioch 26.01 26 Somersville Road, Auto Center Drive Signed as exits 26A (Somersville Road) and 26B (Auto Center Drive)
26.94 27A Contra Loma Boulevard, L Street Eastbound exit and westbound entrance
27.29 27B G Street – Central Antioch Closed; former eastbound exit and westbound entrance
R27.79 28 A Street, Lone Tree Way
R28.94 29 Hillcrest Avenue
31.13 30 SR 160 north – Rio Vista, Sacramento Eastbound exit and westbound entrance; former SR 4 east; west end of bypass
31 Laurel Road
Brentwood 33 Lone Tree Way
East end of freeway
Sand Creek Road At-grade intersection; proposed interchange
Balfour Road At-grade intersection; proposed interchange
Marsh Creek Road, Vasco Road – Concord, Livermore East end of bypass
Walnut Boulevard – Brentwood, Livermore
43.97 Byron Highway, Marsh Creek Road – Brentwood Byron Highway was former SR 4 west
Byron R44.37 CR J4 (Byron Highway) – Byron, Tracy
San Joaquin
 5.96 CR J2 (Tracy Boulevard) – Tracy
Stockton 15.91

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