Tire Chain Laws by State
Complete guide to tire chain requirements for commercial vehicles, oversize loads, and escort operators. Know what's required before you hit a chain control checkpoint.
Chain Control Levels Explained
Chains or snow tires required except 4WD/AWD
Chains required except 4WD/AWD with snow tires
Chains required on ALL vehicles — no exceptions
Note: Not all states use the R1/R2/R3 system. Some states simply activate "chain zones" during winter weather.
Tire Chain Requirements by State
| State | Requirement | Season | Escort/Pilot Car | Severity |
|---|---|---|---|---|
| California | Chain controls (R1/R2/R3) on mountain passes | Nov – Apr | Must comply when controls active | high |
| Colorado | Traction Law + chain law on I-70 corridor | Sep 1 – May 31 | Must comply; 4WD may exempt in lower controls | high |
| Oregon | Statewide chain advisory zones | Nov 1 – Apr 1 | Must carry chains; studded tires allowed Nov–Apr | high |
| Washington | Chain controls on mountain passes | Nov – Mar | 4WD/AWD with snow tires OK in most zones | high |
| Nevada | Chain controls on select highways | Oct – May | Must comply when controls activated | medium |
| Idaho | Chain-up areas on I-90, US-95, SH-21 | Nov – Apr | 4WD/AWD with snow tires typically exempt | medium |
| Montana | Chain requirements on select passes | Oct – May | Must carry chains in mountain zones | medium |
| Wyoming | Closures + chain requirements on I-80, I-25 | Oct – May | Must comply; frequent closures in winter | high |
| Utah | Chain restrictions on specific canyons | Nov – Apr | 4WD/AWD with M+S tires may be exempt | medium |
| Vermont | Studded tires/chains allowed; no mandate | Oct – Apr (studs) | Chains recommended for mountain routes | low |
| New Hampshire | No chain law but chains/studs permitted | Oct – May (studs) | Carry chains for northern mountain routes | low |
| Maine | Studded tires allowed; chains permitted | Oct – May (studs) | Recommended for escort operations | low |
| Minnesota | No chain law; chains/studs allowed | N/A | Chains not required but recommended | low |
| Michigan | No chain law in most areas; studs prohibited | N/A | Snow tires recommended; no chains needed | low |
| Pennsylvania | Chain/traction device requirement in snow emergencies | Nov – Apr | Must comply when emergency declared | medium |
| New Mexico | Chain controls on select mountain passes | Nov – Mar | Must comply when controls active | low |
| Arizona | Chain controls on I-40, I-17 in snow | Nov – Mar | Must comply when controls activated | low |
Chain Equipment for Escort Operators
Class S Chains
$60–$150/setMost common for light trucks/SUVs. SAE Class S clearance fits most escort vehicles without fender modification.
Cable Chains
$40–$100/setLighter, easier to install. Acceptable in most states for non-commercial vehicles. Good for pilot car operators.
AutoSock / Fabric Chains
$80–$120/setAccepted in some states as alternative to chains during R1 controls. Check state approval before relying on these.
Snow Tires (M+S rated)
$120–$250/tireMud and snow rated tires may exempt you from chains during R1/lower controls in many states. 3PMSF symbol preferred.
Frequently Asked Questions
Plan Your Route with Confidence
Use Haul Command's route planning tools to check chain requirements, frost laws, and escort requirements for your entire corridor — before you dispatch.