2021 FROST LAWS UPDATE.
Special Note: Oversize loads are not permitted to travel when a "no unnecessary travel advisory" is issued. An enroute load may proceed to (or return to) the nearest parking area or town. At no time shall the load continue beyond these points unless approved by the Wyoming Highway Patrol.
A partial view of Wyoming's extensive table of restrictions including weight restrictions during periods of spring thaw is shown in the following figure:
The table is available at: http://www.dot.state.wy.us/WidthRestrictions/Calculate Oversize/Overweight Load Regulations and Prices Instantly with Oversize.io