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Mountain Road Report

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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.

California Highway 4
California Highway 12
California Highway 26
California Highway 49
Highway 50
Tuolumne County J59
Interstate 80
California Highway 88
California Highway 99
California Highway 108
California Highway 120

Highway 4

[IN THE CENTRAL CALIFORNIA AREA]

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 0.5 mi east of Camp Connell (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

[IN THE CENTRAL CALIFORNIA AREA]

1-way controlled traffic at various locations from Greene St to Maple Ave
/in Kenwood/ (Sonoma Co) from 2100 hrs each night to 0600 hrs each morning
Monday thru Friday thru 10/17/25 - Due to construction

1-way controlled traffic at various locations from Arnold Dr to Babb Lane
/in Oakmont/ (Sonoma Co) from 2100 hrs each night to 0500 hrs each morning
Monday thru Friday thru 10/17/25 - Due to construction

Highway 26

[IN THE CENTRAL CALIFORNIA & SIERRA NEVADA]

1-way controlled traffic at various locations from 3.3 mi east to 5.6 mi
east of the Jct of SR 49 /at Rich Gulch Ln/ (Calaveras Co) 24 hrs a day 7
days a week thru 12/31/25 - Due to construction

Highway 49

[IN THE CENTRAL CALIFORNIA AREA]

No traffic restrictions are reported for this area.

[IN THE NORTHERN CALIFORNIA AREA]

Is closed to southbound traffic 3.3 mi south of the Placer/Nevada Co line
/at South Fork Dry Creek/ (Placer Co) 24 hrs a day 7 days a week thru 1700 hrs
on 10/31/25 - Due to construction - Motorists are advised to use an alternate
route

Is closed to northbound traffic 3.9 mi north of the Jct of I 80
/at Shale Ridge Rd/ (Placer Co) 24 hrs a day 7 days a week thru 1700 hrs
on 10/31/25 - Due to construction - Motorists are advised to use an alternate
route

Highway 50

[IN THE SACRAMENTO VALLEY & THE LAKE TAHOE BASIN]

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

[CAPITAL CITY FREEWAY]

No traffic restrictions are reported for this area.

Highway 59

[IN THE CENTRAL CALIFORNIA AREA]

No traffic restrictions are reported for this area.

Highway 80

[IN THE SAN FRANCISCO BAY AREA - SOLANO CO]

No traffic restrictions are reported for this area.

[IN THE NORTHERN CALIFORNIA AREA & SIERRA NEVADA]

**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 Truckee (Nevada Co)

**For Westbound Traffic:
Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from the Donner Lake Interchange (Nevada Co) to
4.7 mi west of Kingvale (Placer 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

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

[BUSINESS 80 - CAPITAL CITY FREEWAY]

No traffic restrictions are reported for this area.

Highway 88

[IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA]

Chains are required on all vehicles except 4-wheel-drive vehicles with snow
tires on all 4 wheels from Ham's Station (Amador Co) to Picketts Jct (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

[IN THE CENTRAL CALIFORNIA AREA]

No traffic restrictions are reported for this area.

[IN THE NORTHERN CALIFORNIA AREA]

No traffic restrictions are reported for this area.

Highway 108

[IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA]

Is closed from the 26.4 mi east of Strawberry (Tuolumne Co) to 5.6 mi west
of the Jct of US 395 (Mono Co) /Sonora Pass/ - Due to snow - Motorists are
advised to use an alternate route

Chains or snow tires are required from Strawberry to 26.4 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

[YOSEMITE NAT'L PARK]

For Yosemite Nat'l Park road information call 209-372-0200

Highway 120

[IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA]

Is closed from Yosemite National Park Boundary (Tuolumne Co) to 3.5 mi west
of the North Jct of US 395 /Tioga Pass/ (Mono Co) - Due to snow - Motorists are
advised to use an alternate route

[YOSEMITE NAT'L PARK]

For Yosenite Nat'l Park road information call 209-372-0200

Roads Info Last Updated: Wednesday, 15th of October 2025, 04:59:16 AM

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