In addition to the appropriate CDL group designation, endorsements are required for the following:
T – Double or Triple Trailers – (Triple trailer combinations aren’t permitted in Michigan.)
P – Passenger – For vehicles designed to carry 16 or more people (including the driver)
N – Tank Vehicles – For vehicles designed to haul liquids or liquefied gases in bulk in permanently mounted tanks or portable tanks rated at 1,000 gallons or more
H – Hazardous Materials – To carry hazardous materials in amounts requiring placards
X – Appears on the license instead of the H and N codes when an applicant receives both the tank and hazardous materials endorsements
S – School Bus – For commercial motor vehicles used to transport pre-primary, primary, or secondary school students from home to school, school to home, or to and from school-sponsored events