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To add the Double and Triple Trailer endorsement to your Michigan Commercial Driver’s License (CDL), the main hurdle is passing a 20-question multiple-choice knowledge test. You’ll need a score of 80% (16 correct answers) to pass this test. After passing, you’ll receive the “T” endorsement on your CDL, which is your authorization to pull two or three trailers (where laws allow) and drive combination vehicles that require this added expertise (Michigan CDL Handbook 2025).
In the Great Lakes State, even with a Double and Triple Trailer endorsement, you’re only allowed to pull double trailers. Rest assured, though, earning this endorsement not only increases your standing in the transport industry but dramatically raises your job prospects and earning potential, especially in Michigan. Michigan has a higher weight limit due to the nature of much of its industrial transport needs, so double trailers are often used for the transport of automotive parts, gravel and sand, steel and metal, wood and lumber, and, of course, general freight and consumer goods. You may be saying to yourself, “This sounds incredible! But how can I best prepare for the test?”
M.S., Chief Educational Researcher (ACES member)
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With so much online information available, it’s easy to feel completely overwhelmed. What you need is a systematic, targeted approach, and that’s exactly what our online practice test offers. Up to date as of December 2025, it includes 20 multiple-choice questions that resemble what you will face at the SOS on your test day!
As you work through our Michigan CDL Double/Triple trailers practice test, you’ll receive real-time in-depth feedback on your answers. Get a question wrong? No worries! You’ll immediately see why a different response is correct. This process strengthens your memory as you progress instead of bombarding you with a multi-topic summary at the end.
In Michigan, passing the knowledge test is the only requirement for adding the “T” endorsement to your Class A CDL. There is no additional driving test. Once you’ve prepared, practiced with our free tests, and feel confident, simply apply at the SOS. Bring your documents, pay the appropriate fee, and pass the test to officially receive the endorsement.
Looking for other Michigan-based CDL endorsements? Find tons of valuable information and practice tests here.
Driver’s Ed is - nobody wants to set foot inside the SOS. 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 2025 MI 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 SOS.
