Heavy Truck Braking System and Braking Techniques program talks about the different types of braking systems and operation. Without a doubt, the single most important component in any vehicle is the braking system. This is especially true on heavy trucks which can weigh 20-30 times the weight of the average passenger vehicles. Some truck drivers do not understand how to operate heavy truck brakes. The tractor portion of a tractor-semi trailer rig may have ten or more valves controlling the air flow to the brakes. Key Words: Heavy Truck, Braking System, Braking Techniques, Braking Operation, Safety Video, Safety Training, Safety DVD. Runtime: 10 Min. WITH PURCHASE OF ANY ENGLISH VHS OR DVD YOU WILL RECEIVE A FREE WRITTEN MATERIAL CD-Rom. The CD-ROM of written materials may include: Leaders Guides, Questions & Answers, Manuals, and Power Points. Contents vary depending on program.