The most recent version of the official Colorado CDL handbook. These audio files are in MP3 audio format and can be played right inside your browser and are an easy way to study for the written test. The files are compatible with most mobile devices. Listen to them on the go! If you prefer to download the book as a PDF, you can get a direct download link by clicking "View handbook" above.
Please note: this audiobook was computer-generated using text-to-speech voice technology. It may not be as clear as an audiobook produced by a real person, but it is every bit as easy to listen to and understand.