WYDOT Travel Information Service (Laramie)
  Wyoming State Government:     Citizen       Business       Government       Visitor
Wyoming Travel Information Service
5300 Bishop Blvd.
Cheyenne, WY 82009-3340

Wyoming 511

Toll Free Nationwide:
1-888-WYO-ROAD
(1-888-996-7623)

Term Description
Chain Law Click here to view the two levels of restriction associated with Wyoming's chain law.

No Unnecessary Travel: The road is open but travel is not recommended due to hazardous driving conditions. Generally, this advisory is posted during winter months due to extremely icy conditions, when visibility is limited due to blowing snow, or when a combinations of conditions makes travel ill-advised.

Only the most urgent of situations should warrant travel in a No Unnecessary Travel advisory. Drivers who attempt such travel should be familiar with local conditions and be very experienced with winter driving.

Please keep in mind that by choosing to travel during hazardous conditions, you may be interfering with maintenance personnel and their efforts to improve highway safety.

No Light Trailers: WYDOT will post a No Light Trailer message on the information systems when the wind gusts are greater than 50 mph with ANY road conditions.

This advisory pertains to trailers of any size (commercial and non-commercial) and to other vehicles such as recreational vehicles which are loaded with light materials (or are empty) and have a profile that is subject to wind gusts. Drivers of such vehicles are advised not to travel when a "no light trailers' advisory is posted as they can anticipate strong gusts of wind which may result in the loss of control of their vehicle or the potential for their vehicle to completely blow over.

Blow-overs of light trailers are very common in Wyoming. Controlling a vehicle during a strong wind event can be even more difficult when slick road conditions are present.

There is no specific research that has been done to study at what wind speeds and what load weights trucks will blow over. Therefore, WYDOT cannot provide a specific weight or wind speed that will cause a trailer to blow over.

Any driver who fails to comply with the "no light trailer" advisory and who is involved in a crash may be subject to a fine and can expect to pay the cleanup costs and fees associated with repairing any damage caused to public and/or private property.

Closure to Light, High-Profile Vehicles: In locations where wind gusts are 65 mph or more AND where adequate signage to indicate the limited closure is available, WYDOT will initiate a closure to light, high-profile vehicles. This closure is targeted at vehicles that are prone to being blown over such as recreational vehicles, moving vans, campers, small trailers and lightly loaded commercial vehicles but smaller vehicles pulling trailers are also included in this restriction. Drivers of vehicles that fail to heed this type of closure will be considered in violation of Wyoming Statute 24-1-109 and 'shall be subject to a fine of not more than seven hundred fifty dollars ($750.00) or to imprisonment for a period not to exceed thirty (30) days, or to both such fine and imprisonment.'

Research shows that when wind gusts exceed 65 mph, there is almost certainty that multiple vehicles will be blown over or be involved in a loss of control type of crash. These crashes most often result in debris on the highway that results in a road closure to all vehicles. It is important to note that WYDOT does not have adequate signage to implement a closure to light, high-profile vehicles in all locations. Additional sites may have wind gusts exceeding 65 mph and pose a significant risk of blow over. In these locations, WYDOT will indicate 'Extreme Blow Over Risk' on our information systems and drivers should exercise special caution.

Extreme Blow Over Risk: In locations where wind gusts are 65 mph or more and where adequate signage to indicate a closure to light, high profile vehicles is NOT available, WYDOT will issue an Extreme Blow Over Risk warning. This warning is targeted at vehicles that are prone to being blown over such as recreational vehicles, moving vans, campers, small trailers and lightly loaded commercial vehicles but smaller vehicles pulling trailers are also included in this restriction.

Black Ice: A thin coating or glaze of ice on the road that is particularly dangerous as it may appear to be a film of water or may not be visible/discernable at all.

No Trailer Traffic: The No Trailer Traffic restriction is used exclusively on WYO 22 (Teton Pass) and is used at times when snow and ice combine with the terrain to make stopping of trailers difficult or impossible.

Falling Rock: The falling rock advisory is used on sections of roadway that pass through rock cut sections. Such sections are prone to scaling of rock during freeze-thaw periods though rock falls may happen at any time of year.

 
Dry: The road is free of puddles and standing water.
Wet: There are puddles and standing water present; spray coming off cars.
Slick: Long, continuous sections of icy or snow packed roads. Greater than 50% of road section is icy or snow packed.
Slick in Spots: Short, non-continuous sections of icy or snow packed road. Less than 50% of road section is icy or snow packed.
Drifted Snow: Drifts of any size that cross the white line and cause a driver to feel a bump or a pull on the steering wheel.
 
Snow: Snow in excess of an isolated or occasional shower with the potential to stick to the road surface.
Rain: In excess of light showers with potential to make the road surface wet.
Strong Wind: Wind gusts of 35 mph with ANY road condition.
Fog: Fog that may impair visibility.
Blowing Snow: Snow propelled by the wind across or along the road surface at least 1 foot above the ground.
Reduced Visibility: Visibility less than 400 feet for any reason.

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