(A) Every motor vehicle, other than a motorcycle, operated upon any highway or street shall be equipped with brakes adequate to control movement of same to stop and to hold the vehicle, including two separate means of applying the brakes, each of which means shall be effective to apply the brakes to at least two wheels. If these two separate means of applying brakes are connected in any way, they shall be so constructed that failure of any one part of the operating mechanism shall not leave the motor vehicle without brakes on at least two wheels.
(B) On all motor vehicles, except those covered by division (E) below, equipped with four-wheel brakes, the service brake shall be capable of stopping the motor vehicle from a speed of 20 mph within a distance of 25 feet.
(C) All motor vehicles, except those covered by division (E) below, equipped with only two-wheel brakes, shall have the service brakes so adjusted as to stop the vehicle from a speed of 20 mph within a distance of 37.5 feet.
(D) (1) Braking effort on front wheels shall not be less than two-thirds of the braking effort on rear wheels, except in cases where factory specifications call for a greater braking power ratio.
(2) In that event not more than 15% variation from factory specifications will be permitted. Braking effort on one front wheel or one rear wheel shall not be less than four-fifths of the braking effort of the opposite front wheel or rear wheel.
(E) Buses, trucks, truck-tractors and every combination of motor vehicle shall be equipped with brakes upon one or more of the vehicles adequate to stop and to hold the vehicles or combination of motor vehicles. Every motor vehicle, or combination of motor vehicles, according to its type, and exceeding 7,000 pounds gross weight, shall be capable of stopping within the following distances at all times and under all conditions of loading:
(1) Where equipped with brakes on all wheels, the stopping distance shall be 30 feet at a speed of 20 mph.
(2) Where not equipped with brakes on all wheels, the stopping distance shall be 45 feet at a speed of 20 mph. Total braking effort on front wheels shall not be less than one-third of the total of the rear wheels. Variations from side to side shall be the same as provided in division (D) above.
(F) All tests, provided in this section, shall be applied on dry, hard, smooth, level pavement, free from loose material.
(G) The pedal on all brakes shall have at least one-inch clearance from the floor board of the vehicle upon the first application of the pedal.
(Prior Code, § 16-1208) Penalty, see § 70.999
Statutory reference:
Brake requirements, see 47 O.S. §§ 12-301 to 12-315