“O” Restriction
An applicant with a class “A” commercial driver’s license (CDL) cannot drive with a tractor trailer if the applicant holds an "O" restriction. The “O” restriction is given to those who did not test with a tractor trailer to obtain their CDL. They tested in a heavy truck with a trailer. The trailer had a gross vehicle weight rating (GVWR) of more than 10,000 lbs. Combined with the truck, the combination exceeded 26,000 lbs.
To upgrade from an “A” class CDL and or remove the “O” restriction, the CDL driver must:
- Obtain a CDL learner’s permit
- Retain the learner's permit for at least 14 days
- Schedule a skills test with a proper accompanying driver and provide the correct type and class of vehicle and trailer combination for your test
- Complete and pass a full pre-trip, on-the-course and on-the-road skills tests.
- Obtain a new CDL license that removes the restriction
“E” Restriction
Applicants who test for a CDL in a commercial motor vehicle equipped with an automatic transmission are given an “E” restriction on their licenses. The driver is not permitted to operate any commercial vehicle that does not have an automatic transmission. To operate a commercial motor vehicle with a standard shift or manual transmission, the driver will be required to retest in a commercial motor vehicle that is equipped with a standard shift or manual transmission.
To remove the “E” restriction, the CDL driver must:
- Obtain a CDL learner’s permit
- Retain the learner's permit for at least 14 days
- Schedule a skills test with a proper accompanying driver and provide a representative vehicle of the correct type and class. The vehicle must have a standard shift or manual transmission.
- Conduct an air brake check (if equipped) to make sure the brake system is working properly. This is not scored.
- Pass an on-the-road skills test
- Obtain a new CDL license that removes the restriction
"L" Restriction
An “L” restriction is placed on a Maryland CDL for drivers who have tested and qualified to drive a commercial motor vehicle with no air brakes. The "L" restriction states that the license is issued for a commercial motor vehicle not equipped with air brakes.
“Z” Restriction
A “Z” restriction is placed on a Maryland CDL for drivers who have tested and qualified to drive a commercial motor vehicle equipped with air over hydraulic brakes. The "Z" restriction states that the license is issued for a commercial motor vehicle with a system that is equipped without full air brakes.
To remove an “L” or a
“Z” restriction, the applicant must get a new permit and pass a full pre-trip
and on-the-road skills test in the same type and class of vehicle.
The restrictions can only be removed from a valid CDL and the commercial driver must:
- Pass the air brake law test and obtain a CDL learner's permit
- Retain the learner's permit for at least 14 days
- Schedule a skills test and provide a representative vehicle with airbrakes for testing with a proper accompanying driver
- Pass a full pre-trip
and on-the-road skills test
- Obtain a new CDL license that removes the restriction
The trailer is not required to have air brakes so long as the truck does.
Once the applicant has successfully completed the pre-trip inspection, a public on-the-road test will be administered. Because the applicant is not upgrading the class of the license, the on-the-course skills test of maneuvers is not required.
To upgrade a license or to remove the “O” restriction to be able to drive with a tractor trailer, a full pre-trip, on-the-course, and on-the-road skills tests are required.
Please note that before any vehicle can be used for testing, a cursory inspection is made by the examiner to make certain that the vehicle is safe to go on the road. The examiner will be looking for defective equipment (bad tires, leaks, broken lights) that might otherwise disqualify the vehicle. The applicant is not scored on the cursory inspection.
School Buses and Passengers
A commercial driver who wishes to upgrade their license to add a school bus endorsement or add passengers is not required to test in a commercial motor vehicle with a manual transmission if they hold a license without the "E" restriction for no manual transmission equipped commercial motor vehicles. The same is true of commercial drivers who do not have an "L" restriction on their license. They are not required to test in a commercial vehicle with a full air brake system.
For class and restriction codes, please click here.