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From the flat farmlands of western Ohio, the rolling hills of the southeast, and the beautiful views of Lake Erie, you’re sure to encounter a rich display of diversity in both terrain and weather as you drive these roads. Since you’re here, you must be considering adding the Doubles/Triples Trailers (T) endorsement to your Ohio Commercial Driver’s License (CDL). Before we dive into what is needed to obtain this certification, just know at the outset that adding it to your commercial license opens a world of career opportunities and income-producing marketability. We’ll discuss that in more detail in a moment.
All you have to do is pass a 20-question multiple-choice knowledge test. To pass, you’ll need a score of 80% (16 correct answers). No additional skills test is needed. Once you pass this knowledge test, you’ll receive the “T” endorsement on your CDL, authorizing you to pull two or three trailers (where allowed) (Ohio CDL Handbook 2025).
Chief Educational Researcher, Driving‑Tests.org (ACES member)
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In the Buckeye State, you must be at least 18 years of age to add this certification to your CDL; however, the age requirement to travel across state lines is federally mandated at 21 or older. While the Double-Triple Trailers endorsement technically qualifies you for both doubles and triples, you’re only permitted to tow double trailers in Ohio. That said, double trailers are often used throughout Ohio for the transport of automotive parts and vehicles (Detroit, Cleveland, and Toledo are major hubs), agricultural products like soybeans, dairy, and livestock, steel and industrial products, chemicals and plastics, and consumer goods and electronics. By this point, you’re probably saying, “Great! But how can I best prepare for the test?”
Our online Ohio CDL Double/Triple Trailers Endorsement practice test is designed to cut through the daunting amount of information you will find on the internet. Up to date as of December 2025, it includes 20 multiple-choice questions that resemble what you will face at the BMV on your test day! You’ll also receive instant feedback on each answer, allowing for real-time learning versus sorting through a mountain of feedback at the end.
When you’re ready and confident from practicing with our free tests, simply apply at the BMV. Bring your documents, pay the fee, pass with flying colors, and unlock a wealth of new opportunities.
Driver’s Ed is - nobody wants to set foot inside the BMV. 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 OH 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 BMV.
