Road Conditions and Closures

Road Maintenance

Road Conditions and Closures

Nevada County Public Works strives to post road conditions and closures for significant traffic control situations and/or closures related to construction, severe weather-related events, and/or emergencies on County maintained roads only during office hours.  While we attempt to provide as much information as possible, Nevada County does not guarantee that the information provided is accurate or complete.  Access to this data is at the user's risk. 

  • For current road closures on County Maintained roads, enter the road or address into our interactive map below. 
  • Closures now sync with Google Maps, WAZE and Ready Nevada County. 

Want to know more about what to expect during storms and snow?

Check out our link to "Living in Snow Country" and  "Snow Plow Operation - County Code.


March 8, 2021 Traffic Alert

Mid-Week Sierra Storm to Cause Travel Delays in Region with 
Low Elevation Snow and Chain Controls Anticipated

MARYSVILLE – Following a weak weekend weather system, a stronger storm system is anticipated today through Thursday, delivering periods of valley rain and mountain snow, according to the National Weather Service.
Beginning tonight, snow levels in the Sierra are expected to drop to 2,000-3,000 feet with 1-5 inches possible overnight. Between Tuesday and Thursday morning, another 5-10 inches of snow is anticipated with low snow levels between 2,000-3,500 feet. Current forecasts indicate heavier snow  and travel impacts Tuesday. Motorists are urged to use caution when traveling in the Sierra.
In the valley and foothill areas, periods of moderate rain and afternoon thunderstorms are expected  with 0.5-1 inch possible in Chico and Grass Valley, and 0.25-0.5 inch anticipated in the Sacramento area. Motorists are advised to be alert for slick roads and roadway ponding throughout the week.
Caltrans reminds drivers to winterize vehicles by ensuring tires are properly inflated and have good tread, and to stock up with water, blankets, snacks, a flashlight and a full tank of gas before mountain travel. Further tips for safe winter driving and information about chain controls can be found at
Motorists also are reminded to carry traction-control devices in their vehicles as permitted highway chain installers do not sell traction devices. Periods of chain control are anticipated during both storms with posted speed limits of 30 mph on Interstate 80 and 25 mph on U.S. Highway 50 during chain-enforcement periods.
Check out Caltrans' “QuickMap” for current road conditions and chain requirements at or download the free QuickMap app on the App Store or Google Play. Motorists also can call the California Highway Information Network automated phone service at
1-800-427-ROAD (7623).

For up to the minute closure notifications on Highways within Nevada County go to the CalTrans Road 
Conditions link below. CalTrans oversees all highways throughout California including 20, 49, 80, 89, 174 and 267 within Nevada County.