PDFRCW 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.
 
 
 
 
Brake
 
 
 
 
system
 
 
 
 
application
 
 
Braking
 
and
 
 
force
 
braking
 
 
as a
Deceler-
distance
 
 
percent-
ation in
in feet
 
 
age of gross
feet per
from an
 
 
vehicle or
second
initial
Classification
 
combination
per
speed of
of vehicles
 
weight
second
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
[ 1963 c 154 s 22.]

NOTES:

Effective date—1963 c 154: See note following RCW 46.37.010.