The Commercial Driver's License (CDL) is the license type required to drive a bus

If you drive a bus that carries passengers, you need a Commercial Driver's License (CDL), not a regular driver's license. A CDL is issued by your state's Department of Motor Vehicles and shows that you have passed written tests and a driving test specific to operating large vehicles. The exact class of CDL you need depends on the weight of the bus and how many passengers it carries.

A regular driver's license, even if you have been driving cars for decades, does not permit you to drive a bus legally. Operating a bus without the correct license can result in fines, criminal charges, and civil liability if an accident occurs.

Key Takeaways

  • You must hold a CDL to drive any bus that carries passengers, regardless of your experience driving other vehicles.
  • Most buses require a Class B CDL, which covers vehicles over 26,001 pounds that carry 16 or more passengers.
  • You will need to pass a written knowledge test, a skills test, and a medical examination before the DMV issues your CDL.
  • Some states require additional endorsements on your CDL if you drive a school bus or a bus with air brakes.

Class B CDL for most buses

A Class B CDL is what most bus drivers hold. This license covers any single vehicle over 26,001 pounds that is designed to carry 16 or more passengers, including the driver. City buses, intercity buses, and most shuttle buses fall into this category.

To get a Class B CDL, you must be at least 18 years old (or 21 in some states for interstate driving), pass a written test on traffic laws and vehicle operation, pass a pre-trip inspection test, and pass a road test in an actual bus. You will also need to pass a medical examination and provide proof that you are physically able to operate a commercial vehicle safely.

Class A CDL if you tow a trailer

A Class A CDL is required if you drive a bus that tows a trailer. This might explore to some specialized shuttle operations or motorcoach companies that pull additional equipment. A Class A license covers any combination of vehicles where the towed vehicle weighs more than 10,000 pounds.

The testing requirements for a Class A CDL are more extensive than for a Class B because you must demonstrate the ability to control a longer, more complex vehicle combination. If you already hold a Class B CDL and later need to tow a trailer, you can upgrade to a Class A by passing the additional tests.

School bus endorsement

If you drive a school bus, your Class B CDL must include an S endorsement (School Bus). This endorsement requires you to pass an additional written test covering school bus safety, passenger management, and emergency procedures. Some states also require you to pass a separate skills test in a school bus.

The S endorsement is mandatory in all states before you can legally transport students. Even if you hold a valid CDL without this endorsement, you cannot drive a school bus. The endorsement must be renewed or renewed at the same time as your CDL.

Air brake restriction and endorsement

If the bus you drive has an air brake system, you may need an air brake endorsement or face an air brake restriction on your license. Some states require you to pass a separate test on air brake operation; others automatically restrict your license to vehicles without air brakes if you do not pass this test.

An air brake restriction means you can only drive buses with hydraulic brakes, which limits your job options. If you want to drive any bus with air brakes, take the air brake test during your CDL testing process. This test covers how air brakes work, how to inspect them, and how to use them safely.

Passenger endorsement

Some states require a P endorsement (Passenger) on top of your Class B CDL if you drive a bus carrying passengers. This endorsement requires an additional written test covering passenger safety, emergency procedures, and how to manage passengers during normal operation and emergencies.

Not all states use a separate P endorsement — some consider it part of the standard Class B CDL testing. Check with your state's DMV to learn whether you need this endorsement or whether it is already included in your Class B license.

Steps to obtain a bus driver CDL

The process begins with getting a CDL permit, which allows you to practice driving a bus under supervision. You explore at your state's DMV, pass a written knowledge test, and pass a medical examination. The permit is usually valid for six months to a year.

Next, you schedule a skills test with your state's DMV or an approved third-party testing facility. The skills test has three parts: a pre-trip inspection (you walk around the bus and point out safety features), a basic control skills test (you maneuver the bus in a controlled area), and a road test (you drive the bus on public roads). Once you pass all three parts, the DMV issues your CDL.

If you need endorsements like the S endorsement for school buses or the P endorsement for passengers, you take additional written tests before or after you receive your CDL, depending on your state's process.

Frequently Asked Questions

Can I drive a small bus with fewer than 16 passengers with a regular driver's license?

No. If the bus is designed to carry 16 or more passengers (including the driver), you need a CDL even if you are only carrying a few people on a particular trip. The requirement is based on the vehicle's design capacity, not how many passengers are actually on board.

How long does it take to get a CDL for a bus?

The timeline varies by state and your preparation. Getting your permit usually takes one visit to the DMV. Scheduling the skills test can take weeks or months depending on your state's backlog. Many people spend two to four months preparing and testing, though some complete it faster.

Do I need to renew my bus driver CDL?

Yes. CDLs must be renewed every four or eight years depending on your state. You will need to pass a medical examination again and may need to retake written tests. Some states allow you to renew by mail or online if you have no violations, while others require an in-person visit.

What happens if I drive a bus without a CDL?

Driving a bus without the required CDL is a criminal offense in all states. Penalties include fines ranging from hundreds to thousands of dollars, possible jail time, and a permanent mark on your driving record. You may also face civil liability if you cause an accident.

Can I get a CDL if I have had traffic violations or accidents?

Traffic violations and accidents do not automatically disqualify you from getting a CDL, but serious violations like DUI, reckless driving, or multiple at-fault accidents may prevent you from being hired by a bus company. The DMV will issue a CDL if you meet the testing and medical requirements, but employers have their own hiring standards.