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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 9, 2025, 11:03 PM    
Between Pahaska and the Shoshone National Forest Boundary Wet, Slick in Spots with Rain Falling Rock None Dec 10, 2025, 11:02 AM    
Between the Shoshone National Forest Boundary and Cody Dry with Dangerous Winds Extreme Blow Over Risk None Dec 9, 2025, 11:03 PM    
Between Cody and the Big Horn County Line Dry with Strong Winds None None Dec 10, 2025, 09:02 AM    
Basin
NWS Forecast
Between the Big Horn County Line and 4 miles west of Greybull Dry None None Dec 10, 2025, 10:29 AM    
Between 4 miles west of Greybull and Greybull Dry None None Dec 10, 2025, 10:29 AM    
Between Greybull and Basin Dry None None Dec 10, 2025, 10:29 AM    
Between Basin and MM 176, Washakie/Big Horn County Line Dry None None Dec 10, 2025, 10:29 AM    
Worland
NWS Forecast
Between Washakie/Big Horn County Line and Worland Dry None None Dec 10, 2025, 10:29 AM    
Between Worland and Mile Marker 148, Washakie/Hot Springs County Line Dry None None Dec 10, 2025, 10:29 AM    
Thermopolis
NWS Forecast
Between Mile Marker 148, Washakie/Hot Springs County Line and Thermopolis Dry None None Dec 10, 2025, 10:29 AM    
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 10, 2025, 10:29 AM    
Shoshoni
NWS Forecast
Between Boysen Dam and Shoshoni Dry None None Dec 10, 2025, 10:29 AM    
Between Shoshoni and Moneta Dry None None Dec 10, 2025, 10:29 AM    
Between Moneta and Waltman Dry None None Dec 10, 2025, 10:29 AM    
Casper
NWS Forecast
Between Waltman and Casper Dry None None Dec 10, 2025, 11:17 AM    
Between Casper and Glenrock Dry None None Dec 10, 2025, 11:17 AM    
Douglas
NWS Forecast
Between Glenrock and Douglas Slick in Spots with Dangerous Winds Extreme Blow Over Risk
Closed to all high profile vehicles under 20000 GVW due to gusting winds
Dec 10, 2025, 10:42 AM    
Between Douglas and I-25, Orin Jct Slick in Spots None None Dec 10, 2025, 06:54 AM    
Between I-25, Orin Jct and Lost Springs Slick in Spots None None Dec 10, 2025, 06:54 AM    
Lusk
NWS Forecast
Between Lost Springs and Lusk Slick in Spots None None Dec 10, 2025, 06:19 AM    
Between Lusk and the Nebraska State Line Slick in Spots None None Dec 10, 2025, 06:19 AM    

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.