To add either endorsement to your CDL, you must first obtain a commercial learner’s permit with the appropriate endorsement(s). Keep in mind that if you want to drive a school bus you will need to add both endorsements. Note also that if you have an intrastate waiver, you are not eligible for either the Passenger (P) or School Bus (S) endorsements.

After you receive your commercial learner’s permit, you must hold it for at least 14 days before you can obtain a new CDL with the added endorsement(s). While you are driving with the commercial learner’s permit:

• A supervising driver (mentor) must accompany you. The supervising driver.
  • Must have a valid CDL of the same class as or higher class than your learner’s permit class;
  • Must have a valid DOT Card and intrastate/interstate waiver or exemption if required.
  • Must be 21 years or older;
  • Must have a minimum of 3 years driving experience in the same or higher class and the applicable endorsement(s); and
  • Must be in the front seat, with no other front seat occupants.
• You cannot use any wireless communication device (including cell phone) except to make an emergency 911 call.

The next step is to make an appointment at a MVA full service branch office.

You can set up a skills test appointment by visiting the ​myMVA​ or by calling the MVA Customer Service Center at 410-768-7000 or 1-800-492-4575 TTY for the Hearing Impaired. Please listen to the whole message to hear the prompt to press # 7 then # 2 to speak to a customer service representative so you can schedule an appointment.

CDL and class A & B skills tests are not given at the Baltimore City, Beltsville, Essex, Westminster or White Oak offices. On the day of your scheduled visit, be sure to bring with you the following:

• Maryland commercial learner’s permit
• Maryland CDL
• Valid Medical Examiner’s Certificate (DOT card) and waiver/exemption (if required). See CDL Medical/Physical Requirements for more information. A unaltered photographic copy of the DOT Card is acceptable.
• Vehicles to be used in taking the skills test, with a valid registration card(s).
• Supervising driver – the driver must bring his or her CDL and valid DOT card and waiver/exemption (if required).
• Glasses or contact lenses, if needed.
• Payment for the new CDL (cash, check, or Master Card, Discover Card, or Visa credit card or MVA credit voucher) (if required).

Note: You must provide a safe test vehicle for the driving test. If this vehicle is a rental vehicle, your name must appear on the rental contract as an approved driver of that vehicle or the test will be canceled and you will need to se up another test appointment date.

When you arrive for your scheduled visit, you will receive the appropriate skills test. If you pass all of the tests, you will be directed inside the office where a customer agent will:

• Retrieve your Maryland CDL and commercial learner’s permit;
• Take your photograph; MVA's Photo Guidelines.
• Review the documents you brought with you; and
• Verify that you meet all eligibility requirements.
• You will be asked to sign the application; MVA Signature Guidelines.

The customer agent will then collect the fee​ and issue you the interim document. ​