Visor card · Checked October 17, 2026
Chain law cab card: western states
When you carry, what gets chained, and where to check live.
| State | Carry | Chain up | Check live |
|---|---|---|---|
| CO | Sept 1–May 31, 7 mtn corridors | When posted | COtrip · cotrip.org (opens in a new tab) |
| WA | Nov 1–Apr 1, posted passes + 2 spares | When posted | WSDOT pass reports · wsdot.com/passes (opens in a new tab) |
| OR | Where posted (carry sign); ODOT: carry when conditions may require | When posted | TripCheck · tripcheck.com (opens in a new tab) |
| CA | No season; screened at checkpoints | When posted | QuickMap · quickmap.dot.ca.gov (opens in a new tab) |
| NV | Combos: 1 set/powered wheel, in season | When posted | Nevada 511 · nvroads.com (opens in a new tab) |
| ID | None | Posted passes only | 511 Idaho · 511.idaho.gov (opens in a new tab) |
| MT | Oct 1–Apr 30, 26,001+ lb towing (4WD exempt) | When posted | 511MT · 511mt.net (opens in a new tab) |
| WY | None | Level 2: 2 drive wheels, same axle | WYDOT 511 · wyoroad.info (opens in a new tab) |
| UT | None | Traction Law: all drive tires, 12,000+ lb | UDOT Traffic · udottraffic.utah.gov (opens in a new tab) |
Sources
- Colorado State Patrol: Chain law information (opens in a new tab)
- SB24-100 session law amending C.R.S. 42-4-106 (opens in a new tab)
- CDOT: What must be carried (PDF) (opens in a new tab)
- WSDOT: Chain requirements for vehicles over 10,000 lb (opens in a new tab)
- WAC 204-24-050 (opens in a new tab)
- WSDOT Winter Driving Guide (PDF) (opens in a new tab)
- ODOT: Tips for commercial vehicle drivers (opens in a new tab)
- ODOT: Chains and traction tires (opens in a new tab)
- ORS 815.142: Failure to carry traction tires or chains (opens in a new tab)
- Caltrans: Truck chain requirements (opens in a new tab)
- Caltrans: Chain control status chart (opens in a new tab)
- Judicial Council: Uniform Bail and Penalty Schedule (opens in a new tab)
- NDOT: Traction and chain requirement descriptions (opens in a new tab)
- NAC 484D.420 (opens in a new tab)
- Idaho Code 49-948 (opens in a new tab)
- MDT: Montana tire and chain laws (opens in a new tab)
- WYDOT: Chain law (opens in a new tab)
- WYDOT: Travel restriction statute (W.S. 31-5-956) (opens in a new tab)
- UDOT: Snow tire, chain & traction device requirements (opens in a new tab)
- UDOT motor carriers: R920-6 text (opens in a new tab)