ModerateRoadActiveThe Slope
US-550N traction law code 15
San Juan County · Started Nov 1, 2026 at 3:08 PM · Updated 9m ago
San Juan Countyarea
Nov 1, 2026, 3:08 PMeffective
Until further noticeexpires
The Slopesource
Warned area as issued by the National Weather Service
Full advisory
Northbound and southbound open. Between County Road 60B (near Silverton) and US Basin Brooklyns / 825 (9 miles north of the Silverton area) from Mile Point 70 to Mile Point 80. Passenger vehicles that are all-wheel drive (AWD) or four-wheel drive (4WD) must have winter (Mountain Snowflake icon) or mud and snow (M+S or M/S) or manufacturer rated all-weather tires with adequate tread depth of at least 3/16 of an inch. Two-wheel drive (2WD) vehicles are required to have chains or an approved traction device. Slower speeds are advised.