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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 reopened to westbound traffic at the Jct of SR 242 /in Concord/
(Contra Costa Co) at 2100 hrs on 1/16/26

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

Highway 12

[IN THE CENTRAL CALIFORNIA AREA]

No traffic restrictions are reported for this area.

Highway 26

[IN THE CENTRAL CALIFORNIA & SIERRA NEVADA]

No traffic restrictions are reported for this area.

Highway 49

[IN THE CENTRAL CALIFORNIA AREA]

No traffic restrictions are reported for this area.

[IN THE NORTHERN CALIFORNIA AREA]

Is closed to all tractor-semitrailer combinations from 2.4 mi north of
Nevada City /at Newton Rd/ (Nevada Co) to Sierraville (Sierra Co) - Due to
traction concerns

Highway 50

[IN THE SACRAMENTO VALLEY & THE LAKE TAHOE BASIN]

No traffic restrictions are reported for this area.

[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]

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]

No traffic restrictions are reported for this area.

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 7.2 mi east of Strawberry (Tuolumne Co) to 5.8 mi west of
the Jct of US 395 (Mono Co) /Sonora Pass/ - For winter - Motorists are
advised to use an alternate route

[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 at the Yosemite National Park Boundary (Tuolumne) to 3.5 mi west
of the North Jct of US 395 /Tioga Pass/ (Mono Co) - For the winter - Motorists
are advised to use an alternate route

Is closed from 5.2 mi east of the Jct of US 395 to 7.1 mi west of the
Jct of US 6 (Mono Co) - For the winter - 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: Friday, 16th of January 2026, 09:59:14 PM

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