Colorado cracks down on winter driving with stricter I-70 traction laws

Colorado is tightening traction laws for passenger vehicles on a key stretch of I-70. The changes come after multiple large pileups caused by drivers unprepared for winter conditions. New rules will now require better tires, chains, or traction devices during the colder months. Starting from 1 September to 31 May, all two-wheel-drive (2WD) vehicles on I-70 between Dotsero and Morrison must carry snow chains or an approved traction device. This applies to both front-wheel-drive and rear-wheel-drive cars. Drivers who fail to comply when the law is active will face a $50 fine plus an additional surcharge.

All-wheel drive (AWD) and four-wheel drive (4WD) vehicles must also meet stricter tire requirements. They need winter-rated, all-weather, or M+S tires with at least 3/16-inch of tread. In extreme weather, even these vehicles may be forced to chain up. The Colorado Department of Transportation (CDOT) and Colorado State Patrol (CSP) will activate the Passenger Vehicle Traction or Chain Laws when conditions worsen. Drivers must then fit chains immediately. Officials advise practising chain installation at home before winter arrives. Beyond equipment, drivers are urged to slow down, leave extra space, and clear all snow from their vehicles. The new measures aim to prevent the multi-vehicle crashes that have plagued the route in recent winters.

The updated laws target unprepared drivers on one of Colorado’s busiest mountain highways. Fines and stricter checks will enforce compliance. Officials hope the changes will reduce accidents and keep traffic moving safely during winter storms.