![]() ![]() N RestrictionĪn N restriction indicates that a driver can only operate a Class C passenger vehicle or school bus. If a driver has a Class A CDL, but obtains their passenger endorsement (P) or school bus endorsement (S) in a Class B vehicle, an M restriction will be issued. ![]() M RestrictionĪn M restriction indicates that a driver can only operate a Class B or C passenger vehicle or school bus. An L restriction will also be issued to drivers that do not pass the air brakes knowledge test. If the skills test isn't taken with a full air brake system, air brake systems aren't properly checked, or air brake system components aren't properly identified, an L restriction will be issued. L RestrictionĪn L restriction prohibits the the operation of a vehicle with a full air brake system. If a skills test is performed with an automatic transmission, an E restriction will be issued. E RestrictionĪn E restriction prohibits CDL truck drivers from operating a vehicle with a manual transmission. Note: There may be additional restrictions depending on the state you legally operate in. The restriction code is placed on the CDL. CDL RestrictionsĬDL restrictions prohibit the operation of certain types of CMVs. A written knowledge test is required to earn a combination tank vehicle and hazmat endorsement. The X endorsement is a combination endorsement for tank vehicles and hazardous materials. A written knowledge test is required to obtain a double/triple trailers endorsement. The T endorsement is necessary for CDL drivers looking to tow a double or triple trailer. A written knowledge test, road skills test, separate application forms, fees, and a background check is required for a school bus endorsement. Prior to obtaining an S endorsement, a P endorsement must be earned. The S endorsement allows drivers to operate a school bus. A written knowledge test and road skills test is required for a passenger endorsement. The P endorsement is needed to operate a vehicle that seats 16 or more people, including the driver. A written knowledge test is required to obtain a tank vehicle endorsement. The N endorsement allows CDL drivers to operate a tank vehicle (a vehicle that transports liquids or gasses). A written knowledge test is needed to obtain a hazmat endorsement. The H endorsement is required to operate a vehicle that contains hazardous materials. Note: There may be additional endorsements depending on the state you legally operate in. Outside of the Class A, B, or C CDL requirements, there are additional tests to obtain the following federal CDL endorsements. CDL endorsements are essential for commercial drivers to operate special types of commercial motor vehicles (CMVs). ![]()
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