Chain control signs go up fast and the requirement changes by level, not by weather. Pick your state and conditions to see which chain requirement applies, what counts as compliant, and when four-wheel drive exempts you from carrying chains.
Do You Need Snow Chains Right Now? Check the Chain Law for Your Route
Mountain chain laws change by road, weather condition, and vehicle type. Know what’s required before the pass — not at the checkpoint.
Select your state, mountain pass, and vehicle type. The checker returns the current chain law level, vehicle requirements, and penalty for non-compliance.
Chain law violations in active weather carry fines up to $500 and can result in forced stop orders. Some passes fine both directions — entry and exit.
Anyone driving mountain passes in winter, RV owners, and commercial drivers on mountain routes.
- State chain law regulations (CA, WA, OR, CO, UT, NV, ID, MT)
- FMCSA commercial vehicle chain requirements
Disclaimer: This tool is provided for educational and informational purposes only and does not constitute legal, safety, or professional advice. Sunferno Automotive Accessories cannot verify how products are installed, used, or attached in your specific vehicle or situation — proper installation, use, and securement are solely the responsibility of the user. Laws and regulations vary by jurisdiction and change over time; always confirm current requirements with your local authorities or a qualified professional. Sunferno products must be used strictly in accordance with manufacturer instructions and applicable regulations.