Caltrans Road Conditions Today: Live Updates on California Highway Closures, Traffic Delays & Safe Detours

Heavy Sierra Snow Prompts Caltrans To Tighten Chain Controls: What Drivers Need To Know Now SACRAMENTO—A potent Pacific storm is pounding California’s mountains this weekend, and Caltrans is warning motorists that “travel could be near-impossible at times” across the Sierra Nevada through Monday evening. Fresh snowfall totals are projected at 1–2 feet above 5,000 feet and 2–5 feet over the 6,000-foot line, with wind gusts pushing 55 mph, triggering white-out conditions on Interstate 80 over Donner Summit and U.S. 50 at Echo Summit. Key highway impacts • I-80: Chain controls from Colfax to Truckee; intermittent closures likely during heavy bursts of snow. • U.S. 50: Chains required Twin Bridges to Meyers; expect multi-hour delays. • SR-88 Carson Pass & SR-49 Gold Country: Traction devices mandatory; watch for fallen trees. • SR-18 & SR-330 in the San Bernardino Mountains: Snow showers could bring sudden restrictions overnight. How to check Caltrans road conditions in real time 1. Caltrans QuickMap (quickmap.dot.ca.gov): Live cameras, chain control markers and CHP incident reports updated every minute. 2. Highway Information Network 1-800-427-7623: Voice menu for route-specific updates. 3. @CaltransDist3, @CaltransHQ and district X feeds on X (Twitter) for closure tweets and plow videos. Safety checklist before you roll • Install chains BEFORE checkpoints; carry spare links and gloves. • Top off fuel or EV charge—expect long idling times. • Pack a “Sierra go-bag”: water, non-perishable snacks, blankets, phone power bank, ice scraper, flashlight. • Keep headlights on and maintain a doubled following distance; black ice forms quickly behind snowplows. • Never drive through flooded valley roadways—up to 3 inches of rain is forecast below 4,000 feet. Driving alternatives Caltrans urges delaying east-west travel until Tuesday if possible. Amtrak’s California Zephyr and Capitol Corridor trains remain operational, and airlines have added limited seats out of Sacramento and Reno-Tahoe. Why this storm matters Early-January is historically the busiest ski-traffic period, and backlog from holiday returns amplifies gridlock. Timely checks of Caltrans road conditions can spell the difference between a safe arrival and a night stuck at elevation. Stay updated Bookmark the Winter Driving Tips portal for avalanche awareness, tire regulations and a QuickMap tutorial. Caltrans will post the next statewide road-condition briefing at 6 a.m. Monday. Bottom line: If you must cross the Sierra, chain up, slow down, and refresh Caltrans road conditions every few miles for the latest restrictions.