Road Information

Know before you go:  National Weather Service  -  Caltrans Social Media  -  QuickMap Real-time Travel Information

Check Current Highway Conditions

 
You can also call 1-800-427-7623 for current highway conditions. Mobile

This highway information is the latest reported as of Monday, February 16th, 2026 at 10:32 PM.

SR 4

[IN THE CENTRAL CALIFORNIA AREA]
Is closed from 0.6 mi east 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

Chains are required on all vehicles except 4-wheel-drive vehicles with snow tires on all 4 wheels from Arnold to the Mt Reba turnoff (Calaveras Co)

Please research chain control locations as caltrans is currently working to update chain control descriptions for consistency with internet mapping, like google maps & mapquest.

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