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) - 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 (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
No traffic restrictions are reported for this area.
Highway 26
No traffic restrictions are reported for this area.
Highway 49
1-way controlled traffic at the Tuolumne/Calaveras Co Line from 0800 hrs to
1445 hrs Tuesday thru Friday thru 4/4/25 - Due to construction
Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from Sierra City to Yuba Pass Summit (Sierra Co)
Chains or snow tires are required from Yuba Pass Summit to Sattley
(Sierra 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 1.5 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
**For Eastbound Traffic:
Is closed eastbound to all tractor-semitrailer combinations at Applegate
(Placer Co) - Due to traction concerns - All tractor-semitrailer combinations
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 3.4 mi east of Gold Run (Placer Co) to
Hirshdale Rd /in Truckee/ (Nevada Co)
**For Westbound Traffic:
Is closed westbound to all tractor-semitrailer combinations at
the Nevada State Line - Due to traction concerns - All tractor-semitrailer
combinations 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 Truckee (Nevada Co) to 3.4 mi east of Baxter
(Placer Co)
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
All westbound trucks are required to stop at the brake check area
0.5 mi west of Nyack (Placer Co) - To reduced the risk of brake fires
No traffic restrictions are reported for this area.
Highway 88
Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from 9 mi east of Pine Grove (Amador Co) to Picketts Jct
(Alpine Co)
Chains or snow tires are required from Picketts Jct to 1 mi west 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]The northbound connector to westbound US 50 /in Sacramento/ (Sacramento Co)
is closed from 2300 hrs each night to 0400 hrs each morning Tuesday thru
Saturday thru 8/15/25 - Due to construction - Motorists are advised to use an
alternate route
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) - 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 6 mi east of Sonora to 7.2 mi east of Strawberry
(Tuolumne 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) - For the winter - Motorists are advised to use an
alternate route
For Yosenite Nat'l Park road information call 209-372-0200
