Requirements for performance.
1. Every motor vehicle and combination of vehicles, at all times and under all conditions of loading, upon application of the service brake, shall be capable of:
(a) Developing a braking force that is not less than the percentage of its gross weight tabulated in subsection 2 for its classification;
(b) Decelerating to a stop from not more than 20 miles per hour at not less than the feet per second per second tabulated in subsection 2 for its classification; and
(c) Stopping from a speed of 20 miles per hour, in not more than the distance tabulated in subsection 2 for its classification, such distance to be measured from the point at which movement of the service brake pedal or control begins.
2. The required braking forces, decelerations and braking distances are tabulated as follows:
Brake system
application
Braking and braking
force as a distance
percentage in feet
of gross Decelera- from an
vehicle or tion in initial
Classification combination feet per speed of
of Vehicles weight second 20 m.p.h.
Passenger vehicles with a seating capacity of 10 people or less including driver, not having manufacturer’s gross vehicle weight rating 52.8% 17 25
All motorcycles, mopeds and motor-driven cycles 43.5% 14 30
Single-unit vehicles with manufac-turer’s gross vehicle weight rating of 10,000 pounds or less................................................... 43.5% 14 30
Single-unit vehicles with manufac-turer’s gross weight rating of more than 10,000 pounds 43.5% 14 40
Combination of a two-axle towing vehicle and trailer with a gross trailer weight of 3,000 pounds or less................................ 43.5% 14 40
Buses, regardless of the number of axles, not having a manufacturer’s gross weight rating 43.5% 14 40
All combinations of vehicles in driveaway-towaway operations 43.5% 14 40
All other vehicles and combinations of vehicles 43.5% 14 50
3. Tests for deceleration and stopping distance shall be made on a substantially level (not to exceed plus or minus 1-percent grade), dry, smooth, hard surface that is free from loose material.
Last modified: February 25, 2006