Road Information

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Check Current Highway Conditions

 
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This highway information is the latest reported as of Wednesday, March 18th, 2026 at 10:35 PM.

SR 4

[IN THE CENTRAL CALIFORNIA AREA]
Is closed at Discovery Bay (Contra Costa Co) at 1355 hrs on 3/18/26 - Due to a traffic collision - Motorists are advised to use an alternate route

Is closed from 0.6 mi west of Lake Alpine to 7.2 mi west of the Jct of SR 89 /Ebbetts Pass/ (Alpine Co) - For the winter - Motorists are advised to use an alternate route

1-way controlled traffic at the Contra Costa/San Joaquin Co Line /at Old River Bridge/ 24 hrs a day 7 days a week thru 1900 hrs on 7/26/26 - Due to construction