Test the brakes on a roadway that meets the following conditions:

Do not test the brakes on a roadway with the following conditions because the tires will not grip the road equally:

Testing is adversely affected if the roadway is crowned, which would throw the weight of the vehicle toward the wheels on one side. Testing is also adversely affected if the roadway is so rough that the wheels tend to bounce.

Test the brakes at different vehicle speeds, with both light and heavy brake pedal pressure. Avoid locking the brakes and sliding the tires. Locked brakes and sliding tires do not indicate brake efficiency, since heavily braked but turning wheels will stop a vehicle in less distance than locked wheels.

The brake system is balanced in order to avoid locking the wheels except at very high deceleration rates. Because of a high deceleration capability, a firmer brake pedal may be felt at higher deceleration levels.