The code provides test procedures and instructions for:
-
Instrumentation and equipment.
-
Vehicle preparation.
-
Determining brake system energy absorption capacity.
-
Calculation of a brake rating.
The code includes provision for those vehicles, single unit, combinations, or special, which cannot be loaded to the manufacturer's rated gross vehicle weight, cannot be accelerated in the time interval required, or cannot attain the specified 50 mph speed.
Methods for measuring energy absorption capacity, other than described herein, may be equally valid.