Mountain Road Report
This map shows real-time local traffic conditions; green means the traffic flow is normal, orange means it is slower than normal, and red and dark red indicates slow and stopped vehicles. Updating Caltrans reports for each highway are below the map click or tap on the highway signs to jump to the road you are interested in.
Highway 4
Is closed from the Mt Reba turnoff to the Jct of SR 89 /Ebbetts Pass/
(Alpine Co) - Due to snow - 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 Cottage Springs (Calaveras Co) to the Mt Reba Turnoff
(Alpine 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
Highway 12
Is closed at the west Jct of SR 121 /in Schellville/ (Sonoma Co) - Due to
flooding - Motorists are advised to use an alternate route
Highway 26
No traffic restrictions are reported for this area.
Highway 49
1-way controlled traffic at the Calaveras/Amador Co Line 24 hrs a day
7 days a week thru 2359 hrs on 1/31/25 - Due to construction
Chains or snow tires are required from Sierra City to Sattley (Sierra Co)
Chains or snow tires are required from 7.3 mi south of Vinton to Vinton
(Plumas 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
Highway 50
Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 3 mi west of Kyburz to Meyers (El Dorado 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.
No traffic restrictions are reported for this area.
Highway 59
No traffic restrictions are reported for this area.
Highway 80
A high wind advisory is in effect at the San Francisco-Oakland Bay Bridge
/in San Francisco/ (San Francisco,Alameda Co) - Travel is not recommended
for campers, trailers, or permit loads
Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from Baxter (Placer Co) to the Nevada State Line
**For Eastbound Traffic:
Eastbound traffic is being held at Baxter (Placer Co) - Due to spinouts
Eastbound traffic is turning single drive axle tractor-semitrailers towing
double trailers are being at Applegate (Placer Co) - Due to traction concerns
**For Westbound Traffic:
Westbound traffic is turning single drive axle tractor-semitrailers towing
double trailers are being at the Nevada State Line - Due to traction concerns
Eastbound trucks are being screened at Applegate (Placer Co) - Drivers must
have maximum chains in their possession in order to proceed - Permit loads are
prohibited
Westbound trucks are being screened 5 mi west of Reno /at Mogul/ (Washoe Co)
- Drivers must have maximum chains in their possession in order to proceed
- Permit loads are prohibited
Please research chain control locations as Caltrans is currently working to
update chain control descriptions for consistency with internet mapping, like
Google Maps & Mapquest
All westbound trucks are required to stop at the brake check area
0.5 mi west of Nyack (Placer Co) - To reduce the risk of brake fires
A high wind advisory is in effect from Richards Blvd /in Davis/ to
Yolo Causeway West (Yolo Co) - Travel is not recommended for campers, trailers, or permit loads
Highway 88
Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from Ham's Station to 3.5 mi east of Silver Lake
(Amador Co)
Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from Dew Drop (Amador Co) to 3.5 mi east of Woodfords
(Alpine 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
Highway 99
No traffic restrictions are reported for this area.
[IN THE NORTHERN CALIFORNIA AREA]No traffic restrictions are reported for this area.
Highway 108
Is closed from 7.2 mi east of Strawberry to 5.3 mi west of the
Jct of US 395 /Sonora Pass/ (Tuolumne,Mono Co) - Due to snow - 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 1 mi west of Long Barn to 7.2 mi east of Strawberry
(Tuolumne Co)
Chains or snow tires are required from 3.8 mi west of the Jct of US 395
to the Jct of US 395 (Mono 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
For Yosemite Nat'l Park road information call 209-372-0200
Highway 120
Is closed from Crane Flat to 3.5 mi west of the North Jct of US 395
/Tioga Pass/ (Tuolumne, Mono Co) - For the winter - Motorists are advised
to use an alternate route
Is closed from 5.1 mi east of the south Jct of US 395 to 7.5 mi west of
the Jct of US 6 (Mono Co) - Due to adverse weather - Motorists are advised to
use an alternate route
For Yosenite Nat'l Park road information call 209-372-0200
