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:
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 percentage of gross vehicle or combination weight | Deceleration 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 |
RCW 46.37.351
Effective date-1963 c 154: See note following RCW 46.37.010.