Chain and traction law · California
Caltrans posts chain controls in three levels, R1, R2 and R3. They go up in the mountains during the winter months. There are no fixed dates. Below: the chain and traction reports in the Caltrans QuickMap feed right now, then the law, each item linked to the official page it comes from.
Chains required. Passenger cars and light trucks under 6,000 lb with snow tires on two drive wheels are exempt, but must carry chains.
Source: dot.ca.gov/travel/winter-driving-tips/chain-controlsChains or traction devices required. 4WD and AWD with snow-tread tires on all four wheels are exempt, but must carry traction devices.
Source: dot.ca.gov/travel/winter-driving-tips/chain-controlsThe Caltrans page gives no fine amount. This page does not state one.
California's traveler site. Current chain and traction requirements are posted there.
Road conditionsEvery closure and alert Caltrans QuickMap is posting, on one map.
Winter closuresSeasonal closures with the dates each agency gives.
Live mapChain and traction reports from every state feed on one map.
Caltrans posts chain controls in three levels, R1, R2 and R3. They go up in the mountains during the winter months. There are no fixed dates. The levels, rules and fines on this page are linked to the official source. The sign on the road is the rule that applies.
The Caltrans page gives no fine amount. This page does not state one.
Caltrans QuickMap posts current requirements. The block at the top of this page reads the Caltrans QuickMap feed every five minutes and lists chain and traction reports. If the feed cannot be reached, the page says so.
Your mile marker shows even offline. Caltrans QuickMap alerts on your route, chain rules included, are part of MileCheck Premium and need a connection to update. Runs on CarPlay and Android Auto.
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