RCW 46.37.351: Performance ability of brakes.

Every motor vehicle and combination of vehicles, at all times and under all conditions of loading, upon application of the service brakes, shall be capable of:

(1) Developing a braking force that is not less than the percentage of its gross weight tabulated herein for its classification,

(2) Decelerating to a stop from not more than twenty miles per hour at not less than the feet per second per second tabulated herein for its classification, and

(3) Stopping from a speed of twenty miles per hour in not more than the distance tabulated herein for its classification, such distance to be measured from the point at which movement of the service brake pedal or control begins.

Tests for deceleration and stopping distance shall be made on a substantially level (not to exceed plus or minus one percent grade), dry, smooth, hard surface that is free from loose material.

Classification

of vehicles

Braking

force

as a

percent-

age of gross

vehicle or

combination

weight

Deceler-

ation in

feet per

second

per

second

Brake

system

application

and

braking

distance

in feet

from an

initial

speed of

20 m.p.h.

A

Passenger vehicles with

a seating capacity of

10 people or less

including driver, not

having a manufacturer's

gross vehicle weight

rating . . . .

52.8%

17

25

B-1

All motorcycles and

motor-driven cycles . . . .

43.5%

14

30

B-2

Single unit vehicles

with a manufacturer's

gross vehicle weight

rating of 10,000

pounds or less . . . .

43.5%

14

30

C-1

Single unit vehicles

with a manufacturer's

gross weight rating of

more than 10,000

pounds . . . .

43.5%

14

40

C-2

Combinations of a

two-axle towing vehicle

and a trailer with a

gross trailer weight of

3,000 pounds or less . . . .

43.5%

14

40

C-3

Buses, regardless of the

number of axles, not

having a manufacturer's

gross weight rating . . . .

43.5%

14

40

C-4

All combinations of

vehicles in driveaway-

towaway operations . . . .

43.5%

14

40

D

All other vehicles and

combinations of

vehicles . . . .

43.5%

14

50