Colorado CDL Handbook (AUDIO) 2025
Denver is famously known as the "Mile High City" because it sits at an elevation of exactly 5,280 feet above sea level. The state of Colorado also has the highest average elevation of any U.S. state; some regions can reach up to 10,000 feet in altitude. So what's it like driving in the Centennial State? At higher elevations, your vehicle's performance might be significantly affected due to lower oxygen levels.
Whether you're driving a school bus or a tanker truck, you must know your vehicle's limits, use engine braking when descending, monitor the tire pressures and perform regular maintenance. Safe driving practices and other useful information can be found in the official CDL manual (Colorado CDL Handbook 2025), which you should read at least once before considering a career in this field. All questions on the CDL general knowledge test are based on this manual, which serves as the main point of reference for aspiring commercial drivers in Colorado.
Studying its complex content might overwhelm beginners who are unfamiliar with this subject. To make studying easier for you, we offer you the Colorado CDL audiobook. Consisting of multiple MP3 files, this audiobook has an approximate total length of 8 hours. You can listen to it while you are working out in the gym, doing housework, or even when you're traveling. The CDL audiobook can be accessed on any device that has an active internet connection and supports a browser. You don't need any specialized software to use this resource. Simply plug in your headphones and choose the MP3 files you wish to play.
If you want to save mobile data, you can also download this audiobook to your device. The PDF version of the CDL manual in written format can also be accessed by clicking the "View Handbook" button at the top-right corner of this page.
Please note: Students who are used to audiobooks narrated by humans might notice a slight difference. We have used text-to-speech voice technology to create this audiobook, which uses a computer-generated voice that is just as easy to understand.