On the one hand the application of downhill driving brakes goes back to the field of application under topographical aspects and on the other hand to the requirements to the vehicles itself. Considering these aspects, a vehicle of great mass should not become an “obstacle to traffic”. Vehicles and vehicle equipment are represented with respect to their downhill driving properties. Function demands can be determined from presented standards of assessment. These standards also include for example construction, arrangement, operation and efficiency, control as well as elevated mass to evaluate constructive solutions. Not only elevated security and transport speed but also lower wear at the service brakes and tubes make obvious the invaluable advantages of the downhill driving brake in the corresponding fields of application.As one of these advantages we can underline the relief of the driver.