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CO CDL School Bus Marathon

Part of mandatory Entry-Level Driver Training Course Based on 2024 CO commercial driver's license manual Available in EN, ES

What to expect on the actual CO CDL exam

  • 20questions
  • 16correct answers to pass
  • 80%passing score

Get ready for your CO School Bus endorsement exam with this marathon practice test. Unlike our regular practice tests, it’ll cycle through all of the available questions until you have answered all of them correctly. If you miss a question, we’ll show it to you again at a later point.

Prepare for your School Bus endorsement exam with our CDL school bus practice tests and review all necessary procedures and safety measures in our complete School Bus endorsement guide.

For our strict accuracy and quality standards, see our Commitment to Accuracy.
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CO commercial driver's license

Perfect for

  • First-time CO CDL and CLP applicants
  • CDL holders adding endorsements
  • CO CDL renewal applicants

Helpful resources

CO CDL Handbook

View the most recent (2024) official CO CDL Handbook.

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CO CDL Practice Test App

Download our free iOS or Android app and practice for your driving test offline or on the go.

10 Things You Should Do Before Your Driving Knowledge Exam (PDF)

Many people do their best but still get to the DMV overconfident and underprepared because they fail to do some of the simple...

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