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Travel information for US Highway 20 is as follows:

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Variable Speed Limits
Chain Law
Neighboring States

District Comments
District 2 (Central)
District 5 (Northwest)


Conditions
Route Location Conditions Advisories Restrictions Last Report Time Cameras Sensors
Cody
NWS Forecast
Between the E Gate of Yellowstone Nat'l Park and Pahaska Road Closed Due To Seasonal Closure Dec 20, 2025, 05:46 AM    
Between Pahaska and the Shoshone National Forest Boundary Slick in Spots Falling Rock None Dec 20, 2025, 12:16 PM    
Between the Shoshone National Forest Boundary and Cody Slick in Spots None None Dec 20, 2025, 12:16 PM    
Between Cody and the Big Horn County Line Wet, Slick in Spots None None Dec 20, 2025, 12:01 PM    
Basin
NWS Forecast
Between the Big Horn County Line and 4 miles west of Greybull Dry None None Dec 20, 2025, 12:44 PM    
Between 4 miles west of Greybull and Greybull Dry None None Dec 20, 2025, 12:44 PM    
Between Greybull and Basin Dry None None Dec 20, 2025, 05:46 AM    
Between Basin and MM 176, Washakie/Big Horn County Line Dry None None Dec 20, 2025, 05:46 AM    
Worland
NWS Forecast
Between Washakie/Big Horn County Line and Worland Dry None None Dec 20, 2025, 11:34 AM    
Between Worland and Mile Marker 148, Washakie/Hot Springs County Line Wet None None Dec 20, 2025, 02:18 PM    
Thermopolis
NWS Forecast
Between Mile Marker 148, Washakie/Hot Springs County Line and Thermopolis Wet, Slick in Spots Black Ice None Dec 20, 2025, 03:56 PM    
Between Thermopolis and Boysen Dam Dry Falling Rock US 20 BUS/WY 789 from milepost 116.100 to 116.500
Width restriction: 12 ft
Height restriction: 15 ft
US 20 BUS/WY 789 from milepost 116.100 to 116.500
Width restriction: 12 ft
Height restriction: 15 ft
Dec 20, 2025, 02:08 PM    
Shoshoni
NWS Forecast
Between Boysen Dam and Shoshoni Dry None None Dec 20, 2025, 02:42 PM    
Between Shoshoni and Moneta Dry None None Dec 20, 2025, 02:42 PM    
Between Moneta and Waltman Dry None None Dec 20, 2025, 02:42 PM    
Casper
NWS Forecast
Between Waltman and Casper Wet None None Dec 20, 2025, 03:11 PM    
Between Casper and Glenrock Slick in Spots None None Dec 20, 2025, 06:17 AM    
Douglas
NWS Forecast
Between Glenrock and Douglas Slick in Spots None None Dec 20, 2025, 06:50 AM    
Between Douglas and I-25, Orin Jct Slick in Spots None None Dec 20, 2025, 08:14 AM    
Between I-25, Orin Jct and Lost Springs Dry None None Dec 20, 2025, 12:27 PM    
Lusk
NWS Forecast
Between Lost Springs and Lusk Dry None None Dec 20, 2025, 01:30 PM    
Between Lusk and the Nebraska State Line Dry None None Dec 20, 2025, 01:30 PM    

Construction Projects
Project Name Project Number WYDOT Contact Contractor Contact Start Date Completion Date Description Road Milepost(s) Surface Delays Last Updated

No active construction projects reported at this time.

*Chain Law - Level 1 Definition
**Chain Law - Level 2 Definition
Other Definitions

Impact Levels Description / Recommended Action
Low Minimal impacts expected, use general caution.
Moderate Some impacts expected, use extra caution. Stay alert for changing road and weather conditions.
High Dangerous impacts expected, use extreme caution, delay travel or consider alternate route. If travel is necessary, slow down and allow extra time.
CLOSED Per W.S. 24-1-109, motorists traveling on a closed road without permission from WYDOT or WHP may be subject to a fine of up to $750 and/or up to 30 days imprisonment.
Seasonal / Long-Duration Event Impact level used to distinguish long-duration events from emergent events.
All travelers are encouraged to check present conditions and forecasts before departing.