A primary concern of every fleet professional is the safe operation and stopping ability of the vehicles in his fleet. A truck’s ability to stop, of course, depends on the condition and quality of its braking system, particularly its brakes’ friction material. The friction material used in truck brakes has changed a great deal over the last few decades and continues to change. As an integral part of the braking system, friction material must be chosen to provide the stopping power necessary in a truck’s specific application. This is especially true for commercial vehicles since any given truck model may be put into a wide range of applications. Light-duty vehicles, however, may well benefit from the use of other-than-normal friction material. Consider, for example, police cruisers that may be used in high-speed pursuits with heavy braking demands.