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 0.7 mi east of Lake Alpine 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 3.5 mi east of 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 from 1.9 mi west of the Jct of SR 121 to the Jct of SR 121
(Sonoma Co) - Due to a flooding - A detour is available
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 Bassetts to Yuba Pass Summit
(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 Twin Bridges 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:
Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from Cisco (Placer Co) to Hirschdale Rd /in Truckee/
(Nevada Co)
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
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 Westbound Traffic:
Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from Truckee (Nevada Co) to 2.5 mi east of the
Jct of SR 20 (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
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
Highway 88
Is closed from 3.5 mi east of Silver Lake to Kirkwood /Carson Spur/
(Amador Co) - Due to avalanche control - 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 6.3 mi east of 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 Kirkwood (Amador Co) to 1 mi west of Woodford
(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
There is a dense fog advisory in effect from the Madera/Merced Co line to
5.2 mi south of the Madera/Merced Co Line (Madera Co) - Motorists are advised
to drive with caution
Northbound traffic is reduced to 1 lane at Armstrong Rd /in Armstrong/
(San Joaquin Co) - Due to an overturned big rig
Is closed 8.5 mi north of Gridley (Butte Co) - Due to flooding - Motorists
are advised to use an alternate route
Highway 108
Is closed from 23.7 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 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) - Due to snow - Motorists are advised to
use an alternate route
For Yosenite Nat'l Park road information call 209-372-0200
