Commercial Driver’s License (CDL) holders drive big vehicles, which include trucks, mainly for the purpose of moving goods and heavy loads between areas (long and short distances). Several categories of CDL holders exist and are separable by the weight, purpose and features of the vehicle being driven. If you want to be a commercial driver, you must take several driving lessons and practice, and pass the CDL test before a CDL license would be issued to you. To be an excellent commercial driver, you must be able to drive in all conditions and weather regardless of the time of the day. A commercial driver’s license will be required if one wants to start driving any of the following a truck conveying hazardous materials, combination vehicles, a truck with double or triple trailers, a tanker truck, a passenger vehicle etc. In this book, we would be discussing several commercial driver’s license vehicles and the important parts a commercial vehicle should have. Also, included in this book are possible questions and answers you would meet when sitting for a CDL test. Below are some of the topics that was discussed in this � Air Brakes � Hazardous Materials which is also known as Hazmats � Combination Vehicles � Doubles and Triples � Tanker License � Passenger Transport � School Bus Endorsement