Wyoming Tire Chain Laws

How Wyoming handles chains

Up to $250 is the fine for busting a chain order, and up to $750 if you cause a highway closure (WS 31-5-956). WYDOT posts two levels. Level 1 takes chains, snow tires, or all-wheel drive. Level 2 takes chains, or AWD with mud-and-snow tires. When chains are ordered, run them on at least two drive wheels at opposite ends of one drive axle. Expect it on I-80 and I-25. High-profile rigs banned in high wind. Check WYDOT 511.

When, where, and what counts

• When required: No fixed season. WYDOT posts a Level 1 or Level 2 restriction in real time when conditions turn hazardous, shown on variable message signs. It can apply to any highway the DOT names.
• Where: I-80 across southern Wyoming, including Elk Mountain and the Arlington stretch, and I-25 from Cheyenne to Buffalo. WYDOT can post it on any highway, and high-wind corridors add light-vehicle bans.
• Applies to: Commercial vehicles when a chain order is posted. Light and high-profile vehicles can be barred outright in extreme wind.
• Chains vs traction devices: Level 1 accepts chains, adequate mud-and-snow tires, or all-wheel drive. Level 2 requires chains, or AWD with adequate M+S tires. When chains are ordered a commercial vehicle runs them on at least two drive wheels at opposite ends of the same drive axle. The statute defines tire chains broadly, so a textile device like AutoSock can qualify if it gives traction equal to metal chains. Carry metal chains as your fallback.
• Check the live order: WYDOT 511 (wyoroad.info or dial 511) for the active Level 1 or Level 2 restriction; variable message signs and closures show the order and any light-vehicle ban.
• Fine: Up to $250 per violation, and up to $750 if the violation causes a highway closure (WS 31-5-956).

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