A CDL B license is the commercial driving credential for buses, large delivery trucks, dump trucks, refuse vehicles, and dozens of other heavy single-unit vehicles that keep Massachusetts running. For candidates who want local routes, daily home time, and consistent job demand, it is often the most practical credential to start with.
Glassdoor posted 124 or more active Class B CDL positions in the Boston metro area in April 2026. The Bureau of Labor Statistics projects 4 percent employment growth for heavy truck drivers through 2034. The demand is structural, not seasonal.
What a CDL B License Is
A CDL B license is a Class B commercial driver’s license that authorizes you to operate any single heavy commercial motor vehicle with a Gross Vehicle Weight Rating of 26,001 pounds or more, as long as you are not towing a separate unit that itself weighs more than 10,000 pounds GVWR.
The Federal Motor Carrier Safety Administration establishes CDL classifications under 49 CFR Part 383. There are three classes. Class A covers large combination vehicles including tractor-trailers. Class B covers single heavy vehicles. Class C covers smaller commercial vehicles for certain passengers or hazardous materials below the Class B weight threshold.
A CDL B license also covers Class C vehicles, so you have broader authorization than Class C alone. What it does not cover is tractor-trailer operation. That requires a Class A CDL.
What Vehicles a CDL B License Covers
- Straight box trucks and large delivery vehicles used by regional and last-mile carriers
- City and regional transit buses, including MBTA routes
- School buses (Passenger and School Bus endorsements required)
- Dump trucks and heavy construction vehicles
- Refuse and recycling collection trucks
- Concrete mixer trucks
- Municipal utility and public works fleet vehicles
- Straight flatbeds where no separate trailer is involved
CDL B vs. CDL A: The Honest Comparison
Most people researching CDL B are also looking at Class A. Here is how they compare.
Vehicles: Class A covers everything Class B does, plus tractor-trailers. A Class A holder can drive all Class B vehicles legally. A Class B holder cannot operate tractor-trailers.
Training: Class A training at CMSC Parker runs 160 hours. Class B is 100 hours. Both are ELDT-compliant. The additional 60 hours in Class A add combination vehicle operation, coupling and uncoupling, and tractor-trailer maneuvering.
Pay and careers: Class A long-haul and specialized freight carry the highest pay in commercial driving. Class B work concentrates in local delivery, transit, and municipal services. Average hourly pay for Class B truck drivers in Massachusetts is $23.91 as of April 2026 according to ZipRecruiter. Transit and municipal Class B roles often include union contracts and pension access that private long-haul positions rarely offer.
Lifestyle: Class A long-haul means nights and weeks away from home. Class B local work means daily home time and familiar routes. For candidates with family commitments, that difference matters more than the pay ceiling.
“I always tell candidates to think about the driving life they actually want before picking a class. Class A is not automatically better. It is heavier training for heavier vehicles. The license should match the work you will actually do.” – Jake Cooney, Director, CMSC Parker Professional Driving School
CDL B License Requirements in Massachusetts
Age: Minimum 18 for intrastate driving within Massachusetts. Minimum 21 for interstate commerce. The restriction lifts at 21 automatically.
Valid Massachusetts driver’s license: Active and unrestricted. Any suspension must be resolved before applying to training.
DOT physical and Medical Examiner’s Certificate: Required before applying for a Commercial Learner’s Permit. A certified DOT examiner checks vision, hearing, cardiovascular health, and blood pressure. Complete this step before anything else.
General Knowledge written test: Taken at the Massachusetts RMV. If you plan to add endorsements or need the Air Brakes restriction removed, take those written tests at the same appointment before your CLP is issued.
ELDT-compliant training: Every first-time CDL B applicant must complete Entry Level Driver Training from an FMCSA-registered provider since February 2022. CMSC Parker is registered on the Training Provider Registry. Training from an unregistered provider will block your skills test from being scheduled.
How to Get Your CDL B License: In Order
- Pass your DOT physical. Receive your Medical Examiner’s Certificate.
- Study the Massachusetts CDL manual. Pass the General Knowledge written test at the RMV. Take endorsement written tests at the same appointment if you know what you need.
- Apply for your Commercial Learner’s Permit. Hold it for the mandatory federal minimum of 14 days.
- Complete CMSC Parker’s 100-hour ELDT-compliant Class B CDL program.
- Pass the three-part CDL skills test: pre-trip vehicle inspection, basic vehicle control, and on-road driving.
- Receive your Massachusetts Class B CDL from the RMV.
Training at CMSC Parker
CMSC Parker’s Class B CDL program is 100 hours: 60 classroom and 40 behind the wheel. Weekday and weekend formats are both available.
Classroom sessions cover FMCSA regulations, pre-trip inspection, air brake systems, hours of service rules, and defensive driving. These are directly tested topics in your skills exam, not background reading.
Behind-the-wheel training uses the same commercial vehicles you will operate during the skills test. Training happens at our Avon campus off Route 24 and our West Boylston campus in Worcester County. Both have on-site training ranges so you are not traveling to a separate location for driving hours.
Class B CDL Jobs in Massachusetts
Massachusetts has consistent demand for CDL B holders across delivery, transit, construction, and municipal services. Our Class B CDL jobs guide covers what is available across the South Shore, Worcester County, Plymouth County, and Greater Boston.
The American Trucking Associations projects the industry needs 1.2 million new commercial drivers over the next decade to replace retirees and keep up with freight demand. That gap runs through every CDL class including Class B.
Funding Your CDL B License
Massachusetts offers real funding options. MassHire Career Centers administer Individual Training Accounts for eligible candidates in career transition. The Senator Donnelly Grant covers additional costs for qualifying Massachusetts residents. CDL Advantage provides financing for those who do not qualify for state funding. Full details are on our financial aid page.
Frequently Asked Questions
How long does CDL B training take at CMSC Parker?
The 100-hour program runs five weekdays or seven weekends. Including CLP preparation and the mandatory 14-day hold, most candidates receive their CDL B within six to eight weeks of starting the process.
Is a CDL B license valid in other states?
Yes. A Massachusetts CDL B is federally recognized and valid across all 50 states. The under-21 intrastate restriction applies universally until you reach 21.
Can I drive a school bus with a CDL B license?
Not automatically. School bus operation requires a Class B CDL with both the Passenger and School Bus endorsements. Those require separate written tests at the RMV and an additional road skills test.
What endorsements should I add to my CDL B?
For transit work, add the Passenger endorsement. For school buses, you need both Passenger and School Bus. For most Class B vehicles, pass the Air Brakes written test before your CLP is issued to prevent the air brakes restriction appearing on your license.
Does CMSC Parker offer career support after graduation?
Yes. Post-program support includes resume assistance, access to our employer network across the South Shore, Worcester County, and Greater Boston, and ongoing job board access.
CMSC Parker has been certifying commercial drivers in Massachusetts since 1996. Licensed by the Massachusetts RMV and the Division of Occupational Licensure. Registered on the FMCSA Training Provider Registry. See Class B schedules at Avon and West Boylston here.
