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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]

The eastbound & westbound connectors to northbound SR 160 (Contra Costa Co)
are closed from 2100 hrs each night to 0500 hrs each morning Monday thru Friday
thru 10/10/25 - Due to construction - Motorists are advised to use an alternate
route

Is closed to westbound traffic from Cummings Skyway to San Pablo Ave
/in Hercules/ (Contra Costa Co) from 1900 hrs each night to 0600 hrs each
morning Monday thru Friday thru 10/10/25 - Due to construction
- Motorists are advised to use an alternate route

1-way controlled traffic at various locations from 5.2 mi west of
Angels Camp /at Appaloosa Rd/ to 4.6 mi west of the Jct of SR 49 (Calaveras Co)
from 0600 hrs to 1600 hrs on Wednesday 10/08/25 - Due to maintenance

1-way controlled traffic from Mitchler Ave to Bog Trees Rd /in Murphys/
(Calaveras Co) from 1900 hrs each night to 0600 hrs each morning Monday thru
Friday thru 10/10/25 - Due to construction

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 10/10/25 - Due to construction

1-way controlled traffic at various locations from Lawler Ranch Parkway
to Denverton Bridge /in Fairfield/ (Solano Co) from 2000 hrs each night to
0500 hrs each morning Monday thru Friday thru 10/10/25 - Due to construction

1-way controlled traffic at various locations from North Front St
/in Rio Vista/ (Solano Co) to the Jct of SR 160 (Sacramento Co) from 1900 hrs
each night to 0600 hrs each morning Monday thru Saturday thru 10/11/25 - 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

1-way controlled traffic 8.3 mi west of the Calaveras/Amador Co Line
/at South Fork Mokelmne River/ from 0600 hrs to 1600 hrs Monday thru Friday thru
10/10/25 - 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]

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]

1-way controlled traffic at various locations from West Olive Ave
/in Merced/ to 2.1 mi north of Merced /at Bellevue Rd/ (Merced Co) from
2000 hrs each night to 0500 hrs each morning Monday thru Saturday thru 10/11/25
- Due to construction

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]

1-way controlled traffic at various locations from Peddler Hill to 5.8 mi
east of Peddler Hill /at Milt's Sandhouse/ (Amador Co) from 0700 hrs to 1600 hrs
on Wednesday 10/08/25 - Due to construction

Highway 99

[IN THE CENTRAL CALIFORNIA AREA]

No traffic restrictions are reported for this area.

[IN THE NORTHERN CALIFORNIA AREA]

Is closed to northbound traffic at 41st Ave /in Sacramento/ (Sacramento Co)
from 1900 hrs each night to 0500 hrs each morning Monday thru Friday thru
10/10/25 - Due to construction - Motorists are advised to use an alternate
route

Highway 108

[IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA]

No traffic restrictions are reported for this area.

[YOSEMITE NAT'L PARK]

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

Highway 120

[IN THE CENTRAL CALIFORNIA AREA & SIERRA NEVADA]

The westbound connector to norhtbound I 5 (San Joaquin Co) is closed from
2100 hrs each night to 0400 hrs each morning Sunday thru Friday thru 10/10/25
- Due to construction - Motorists are advised to use an alternate route

1-way controlled traffic from 1.5 mi east of Oakdale to 1.7 mi east of
Oakdale /at Atlas Rd/ (Stanislaus Co) 2100 hrs each night to 0500 hrs each
morning Monday thru Friday thru 10/10/25 - Due to construction

[YOSEMITE NAT'L PARK]

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

Roads Info Last Updated: Friday, 10th of October 2025, 12:59:20 AM

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