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If you don’t pass the Vermont DMV CDL Air Brakes Knowledge Test, your CDL will include the restriction “L,” which will prohibit you from operating commercial motor vehicles (CMVs) with air brakes. Failing the test in Vermont results in a one-day waiting period and a fee should you decide to retake the test. No worries! Our Vermont DMV CDL Air Brakes Practice Tests are designed to help you pass your knowledge exam on the first attempt.
A CDL without an air brake restriction is necessary for countless job opportunities in Vermont because most semi-trucks, tractor-trailers, and commercial buses rely on air brakes for safe navigation. With the Green Mountains and the steep and winding roads, skilled air brake-qualified drivers are a necessity in Vermont. Additionally, the winter months bring snow, ice, and freezing rain, which demand reliable air brake handling. Key transportation routes include I-89 (a north-south route connecting Burlington to New Hampshire and Canada), I-91 (running along eastern Vermont, linking New Hampshire and Massachusetts), US-7 (a major north-south corridor), and US-4 (running through the mountains) make braking expertise essential. The restriction “L” severely limits your job opportunities in the transportation industry.
M.S., Chief Educational Researcher (ACES member)
Last verified for accuracy on
The Green Mountain State relies on drivers with the air brake qualification in key industries, including dairy and maple syrup production (a major part of the economy), forestry and logging, and tourism. Major companies requiring this qualification include Goodrich Maple Farm and Farm Connex in the agriculture industry and Emerson & Sons Logging and Hot Shot Trucking in the forestry sector. Premier Coach (Williston) and Green Mountain Transit are major tourism and charter bus companies in Vermont. Each school district requires air brake-qualified drivers for its inventory of full-size school buses. The “L” restriction disqualifies you from these and many other jobs.
The written Air Brakes knowledge test features multiple-choice questions based on the state’s CDL manual (Vermont CDL Handbook 2026) and requires a score of at least 80% to pass. Our CDL Air Brakes Practice Tests cover all essentials for the official DMV Air Brakes Knowledge Test. While studying, you will also learn information useful for passing your skills test.
Our Practice Tests mimic the official knowledge test and offer immediate feedback on all responses instead of at the end of the assessment. This approach dramatically speeds learning and ensures you pass the test.
Driver’s Ed is - nobody wants to set foot inside the DMV. 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 VT 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 DMV.
