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Air brakes are a game-changer for commercial drivers, unlocking income potential from a much longer list of companies. If the Massachusetts RMV CDL Air Brakes Knowledge Test is not passed, your CDL will include the restriction “L,” preventing you from operating commercial motor vehicles (CMVs) with air brakes. Failing the air brakes test in Massachusetts results in a one-day waiting period and a fee should you decide to retake the test. We have designed our Massachusetts RMV CDL Air Brakes Practice Tests to take the stress out of preparations.
Securing a CDL without an air brake restriction is essential because most semi-trucks, tractor-trailers, and commercial buses rely on air brakes for safe navigation. The coastal plains, the rolling hills, and the Berkshires in the west provide diverse challenges requiring air brake-qualified drivers. Congested urban areas (like Boston, Springfield, and Worcester) demand powerful, reliable braking, and New England winters add snow, ice, and sleet to the challenge. Key transportation routes include I-90 (Massachusetts Turnpike, an east-west route linking Boston to New York State), I-93 (running north-south, connecting Boston to New Hampshire), I-95 (regional and long-haul freight along the East Coast), and US-7 (servicing western Massachusetts). The restriction “L” eliminates these job opportunities.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
The Bay State relies on drivers with the air brake qualification in key industries, including biotechnology, higher education, manufacturing, and tourism. Major companies requiring this qualification include General Electric (Lynn) and Raytheon (Waltham) in the manufacturing industry, as well as XPO Logistics and FedEx Freight in the logistics sector. Peter Pan Bus Lines (Springfield) and Yankee Line (Boston) are major tourism and charter bus companies. Additionally, Massachusetts’s school districts employ thousands of air brake-qualified drivers for their full-size buses. The “L” restriction disqualifies you from these jobs.
Our CDL Air Brakes Practice Tests cover all essential knowledge for the official RMV Air Brakes Knowledge Test. You’ll learn information that will also be useful as you practice to pass your skills test. The written Air Brakes knowledge test features multiple-choice questions based on the state’s CDL manual (Massachusetts CDL Handbook 2026) and requires a score of at least 80% to pass.
Our Practice Tests are scientifically designed to speed the learning process. By mimicking the official knowledge test and offering immediate feedback on all responses, these tests ensure you’ll pass the knowledge test on your first attempt.
Driver’s Ed is - nobody wants to set foot inside the RMV. That’s why millions of learners trust us for simple, visual, effective prep.
We are an officially recognized FMCSA Entry-Level Driver Training provider and a proud partner to over 2,500 libraries. We work with safety organizations like GHSA and the National Safety Council to help create safer roads for everyone.
Our trademarked system automatically saves questions you miss, creating personalized tests that target your weak spots until you’ve mastered the material.
Get smarter as you study. Our new AI-powered feedback provides detailed, question-level insights to help you understand the why behind each answer.
Go beyond the boring black-and-white manual. Our interactive handbook lets you read, listen with an MP3 audio version, or even chat with it to find the information you need, faster.
We build our practice questions from the current 2026 MA Driver Handbook and refine them using patterns recent test‑takers report.
Driver handbook • Knowledge‑test/permit overview • Fees & ID requirements • Office/appointment info
We mirror recurring themes (e.g., right‑of‑way traps, sign look‑alikes) and use similar distractors and wording styles.
We don’t collect or publish actual test items and we’re not affiliated with RMV.
