Colorado Department of Transportation (CO)

Road Condition Codes

CODE 1: ADVISORY DUE TO WIND
CODE 2: POOR VISIBILITY - DUST/SNOW/FOG
CODE 3 DRY
CODE 4: WET
CODE 5: RAIN
CODE 6: SNOW
CODE 7: SLUSHY
CODE 8: ICY
CODE 9: ICY SPOTS
CODE 10: SNOWPACKED
CODE 11: SNOWPACKED SPOTS
CODE 12: SLIDE - ROCK/SNOW/MUD
CODE 13: CLOSED
CODE 14: DRIFTING SNOW
CODE 15: ADEQUATE SNOW TIRES OR CHAINS REQUIRED
CODE 16: CHAINS ONLY
CODE 17: CHAINS OR ADEQUATE SNOW TIRES REQUIRED FOR ALL COMM VEHICLES-CHAINS ONLY FOR ALL SINGLE AXLE COMM VEHICLE COMBINATIONS OVER 26,000 GVW
CODE 18: CHAINS REQUIRED ON ALL COMMERCIAL VEHICLES (4 SETS ON DRIVE AXLES)