Free CDL study guides, DMV updates, endorsement walkthroughs, pre-trip inspection guides, and truck driving resources — updated regularly and grounded in public FMCSA regulations.
Handpicked reads to jump-start your CDL prep.
Ready to file your CDL hazmat endorsement application? Get a step-by-step breakdown of TSA background check, required docs, fees, and timeline. Start prepping now.
Master federal trucking regulations before your CDL test. This beginner guide covers HOS rules, weight limits, and inspection requirements straight from FMCSA.
Find your state driving manual, confirm the latest PDF edition, and learn how state CDL manuals differ from FMCSA rules. Study smarter, start here.
Find the best free CDL study book for your state: official manuals, trusted resources, and a 30-day study plan. Try CDLTest360's free practice test, no sign-up needed.
Jump straight into a practice test for any CDL topic or endorsement.
Editorial categories across the CDL Knowledge Center.
Strategies and tips to help you pass every CDL knowledge and skills test on the first attempt.
Deep dives on Air Brakes, HazMat, Tanker, Doubles & Triples, Passenger, and School Bus.
Pre-trip inspection walkthroughs and skills-test preparation.
State-by-state CDL testing, fees, and DMV/DPS procedures.
Job outlook, pay, lifestyle, and career paths for new and experienced CDL drivers.
Ready to file your CDL hazmat endorsement application? Get a step-by-step breakdown of TSA background check, required docs, fees, and timeline. Start prepping now.
Master federal trucking regulations before your CDL test. This beginner guide covers HOS rules, weight limits, and inspection requirements straight from FMCSA.
Find your state driving manual, confirm the latest PDF edition, and learn how state CDL manuals differ from FMCSA rules. Study smarter, start here.
Find the best free CDL study book for your state: official manuals, trusted resources, and a 30-day study plan. Try CDLTest360's free practice test, no sign-up needed.
Learn the exact steps to earn your tank and hazmat endorsement (X). TSA process, knowledge tests, costs, timelines, and how to study smart. Start prepping today.
CDL permit test has 50 general knowledge questions with an 80% passing score. See section breakdowns, time limits, state differences, and prep tips to pass.
Getting a hazmat license means passing an ELDT course, TSA background check, and state knowledge test. Here's exactly how to do it in 2026. Start prepping now.
Wondering if you need air brakes for your CDL permit? Learn when the L restriction applies, what it limits, and how to remove it. Study smarter with CDLTest360.
Ready to obtain a hazmat endorsement? This 2026 guide covers the HME knowledge test, TSA fingerprinting, state DMV steps, fees, and renewal. Start prepping now.
CDL basic knowledge spans 20 FMCSA topics on a 50-question exam. Learn what's tested, see real practice questions, and get a 7-step study plan. Start free today.
The CDLTest360 Knowledge Center is a free, growing library of study guides for drivers preparing for a commercial driver's license. Every article is grounded in the public Federal Motor Carrier Safety Administration (FMCSA) regulations and the AAMVA model CDL manual that every state DMV or DPS uses as its source. We publish walkthroughs, test strategies, endorsement deep dives, and pre-trip inspection breakdowns to help new and returning drivers pass on the first attempt.
Whether you're a first-time applicant studying for the General Knowledge exam, an experienced driver adding an Air Brakes, HazMat, or Combination Vehicles endorsement, or a fleet trainee working through ELDT theory hours, you'll find plain-English explanations, checklists, and worked examples here. Our Pre-Trip Inspection guides break down the seven-step method examiners use so nothing gets missed on skills-test day.
Beyond the knowledge exam, we cover the working reality of trucking: pay ranges, home-time expectations, day-in-the-life accounts, choosing between company driving and owner-operator, and how to pick a CDL school. Our state guides walk you through the specific DMV or DPS procedures, fees, medical card requirements, and skills-test scoring for the states we cover — starting with Florida, Texas, and California, with more added regularly.
Articles cite the FMCSA sections and state manuals they draw from so you can verify anything you read here against a primary source. Nothing on this site replaces your state's official CDL manual, but it's designed to make that manual dramatically easier to study from.
New to the site? Start with our free CDL practice tests to see where you stand, then use the articles here to shore up the topics that gave you trouble. Bookmark the page — we publish new material every week.