Wyoming Department of Transportation


Driver License Restriction Codes

Restriction codes are displayed on a driver's license to alert that individual and law enforcement that the holder of that license has limitations and can only safely operate a motor vehicle under certain conditions or circumstances. Restrictions for driving are determined by the driver examiner, physician or medical specialist and vision specialist. Driving restrictions can change over time depending upon a person's physical, mental or vision condition; and the recommendations of the doctors who treat them. The following are restriction codes that can be displayed on Wyoming driver licenses:

  • B - Corrective Lenses
  • C - Mechanical Aid
  • D - Prosthetic Aid
  • E - Automatic Transmission Only
  • F - Outside Rearview Mirrors
  • G - Daylight Driving Only
  • I - Limited "Others"
  • K - Intrastate Driving Only (CDL licenses)
  • L - Vehicles Without Air Brakes
  • M - Class B Bus Only
  • N - Class C Bus Only
  • O - Except Tractor/Trailer
  • Y - Annual Vision Statement Required
  • Z - Annual Medical Statement Required

Corrective Lenses (B) Restriction: Drivers who are required to wear glasses or contacts to meet minimum vision standards are given the "B" restriction. This means that the person MUST wear their glasses or contacts when operating a motor vehicle.   

Mechanical Aid (C) Restriction: If a driver has a physical impairment that requires the use of mechanical aids to safely operate a motor vehicle, then this restriction must be displayed on the driver license. Mechanical aids would be such devices as a spinner knob, hand operated brake or gas pedal, power steering, power brakes, hand-operated dimmer switch or any other mechanical unit installed on the vehicle needed by the driver to help them maintain safe control of that vehicle while driving.  

Prosthetic Aid (D) Restriction : When a driver has a physical impairment that results in the necessity for that person to wear a prosthetic aid, the driver license must display this requirement. This does not mean that just because you wear a prosthetic aid, that you MUST use it when driving. It only means that if you need to wear the aid to enable you to drive safely, then your license must have this restriction displayed on it. Driver examiners can best evaluate whether or not you can safely operate a motor vehicle without the use of your prosthetic aid by having you demonstrate your driving skills behind the wheel. 

Automatic Transmission Only (E) Restriction : Drivers who have difficulty operating a clutch due to a physical impairment, physical strength or because their medical doctor feels it is unsafe for them to operate a clutch, are restricted to only driving vehicles that have automatic transmissions. 

Outside Rearview Mirrors (F) Restriction : When a driver's vision does not meet the minimum visual acuity standard of 20/40 in one eye, then they are restricted to operating a vehicle that has both a left and a right rearview mirror.   

Daylight Driving Only (G) Restriction : Some drivers have difficulty seeing clearly after dusk. Usually, this is a result of visual impairments, or it can be the result of a person's medical condition. A vision or medical specialist will often restrict a patient to only driving during daylight hours because it is not safe for them to be out driving at night. A driver examiner will limit a person to daylight driving when the individual requires telescopic lenses to see, or as a result of a re-examination of the person's ability to safely operate a motor vehicle.  

Limited Others (I) Restriction : This restriction code is used when a driver has special restrictions not covered by any of the other restriction codes. One example would be that the person is required to only drive on roads with a posted speed of 35 mph. Another example would be that a person must only operate a vehicle equipped with an ignition interlock device. A general description of the restriction is necessary to explain special conditions of licensing.

Intrastate Driving Only (K) Restriction : Commercial drivers who hold a Wyoming CDL license may be restricted to only driving a commercial vehicle within the borders of Wyoming. There are many reasons for this restriction such as a medical or visual condition that prohibits interstate driving in a vehicle which meets the federal definition of a commercial vehicle, or the person may not meet the FMCSA minimum age requirement to operate a commercial vehicle. 

Vehicles Without Air Brakes (L) Restriction : Commercial (CDL) drivers who have not passed the written air brakes test and/or the skills test in a vehicle with air brakes must be restricted from driving a vehicle that is equipped with air brakes. 

Class "B" Bus Only (M) Restriction : Commercial (CDL) drivers who hold a class "A" license with a passenger endorsement who passed a driving skills test in a class "B" passenger vehicle must be restricted from operating a class "A" bus. These drivers are only authorized to drive class "B" or class "C" buses.

Class "C" Bus Only (N) Restriction : Commercial (CDL) drivers who hold a class "A" or a class "B" license with a passenger endorsement who passed a driving skills test in a class "C" passenger vehicle must be restricted from operating a class "A" or "B" bus. These drivers are only authorized to drive a class "C" bus.

Except Tractor/Trailer (O) Restriction : Commercial (CDL) drivers who passed their driving skills test in a class "A" vehicle, but the pulling unit only had a Gross Vehicle Weight Rate (GVWR) of 26,000 pounds or less, must be restricted from operating a commercial vehicle that has a pulling unit with a GVWR of 26,001 pounds or more.

Annual Vision Statement Required (Y) Restriction : A driver who has a progressive disease or eye condition that may worsen their visual acuity or visual field over the next year may be restricted by their doctor to submitting an annual vision evaluation statement to Driver Services. Vision statements help to determine if a re-examination of a person's ability drive is necessary. Also, the evaluation statement is reviewed to assure that the driver still meets the minimum vision standards for operating a motor vehicle safely. The vision specialist may add restrictions for driving or reduce the number of restrictions for driving, depending upon the patient's current visual condition. 

Annual Medical Statement Required (Z) Restriction : A driver who has a medical condition that may deteriorate or exacerbate over the next year may be restricted by their doctor to submitting an annual medical evaluation statement to Driver Services. Additionally, drivers whose medical condition results in the loss of consciousness or muscular control may be restricted by their doctor or by the driver examiner if you have had an episode within the previous 12 months of application or renewal.  Medical evaluation statements help to determine if a re-examination of a person's ability to drive is necessary. Restrictions that the person has on their driver license may be affected by the findings of a medical evaluation statement. Restrictions may not always be a result of the re-examination process, but may be added to or removed from the person's driver license upon the recommendation of the medical specialist. 

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