9/12/2023 0 Comments Perception distance![]() ![]() Control the pressure so the vehicle comes to a smooth, safe stop. Normal Stops: To apply the air brakes during normal stops, push the brake pedal down.It will be important for you to understand the difference in the following terms (make sure you memorize the meaning of each): Therefore, for an average driver traveling 55 mph under good traction and brake conditions, the total stopping distance is more than 300 feet. The air brake lag distance at 55 mph on dry pavement adds about 32 feet. Thus, the total stopping distance for vehicles with air brake systems is made up of four different factors: However, with air brakes, it takes a little time (one-half second or more) for the air to flow through the lines to the brakes. With hydraulic brakes (used on cars and light /medium trucks), the brakes work instantly. With air brakes, there is an added delay – the time required for the brakes to work after the brake pedal is pushed. Stopping distance was discussed in Section 2: Speed and Stopping Distance. The anti-lock brake system should be serviced as soon as possible. If an emergency arises, the driver should use the controlled or stab braking method. If the anti-lock brake system fails or malfunctions, the driver must resort to stopping the vehicle by using the normal air-brake method. On the air-brake system the driver must pump or use stab braking in an emergency. This lamp will remain constant if there is a malfunction in the anti-lock brake system.įor normal or emergency stopping using anti-lock brakes, the driverʼs foot remains on the brake pedal in which the anti-lock module then acts as a foot pumping the air brake system. Once the driver turns on the ignition, a yellow malfunction lamp on the instrument panel will light up, briefly indicating that the vehicle has anti-lock brakes. ![]() Vehicles that have anti-lock brakes have a yellow light near the driverʼs rear side of the vehicle with the letters ABS stenciled above the light. ![]() The anti-lock braking system is different than the normal air-brake system but works on the same principle. New trucks and truck-trailer vehicles are equipped with anti-lock brakes. If you reapply the brakes before the wheels start rolling, the vehicle will not straighten out. It can take up to 1 second for the wheels to start rolling after you release the brakes. As soon as the wheels start rolling, put on the brakes fully again.Release the brakes when the wheels lock up.Use only on vehicles without anti-lock systems. If you need to make larger steering adjustments or if the wheels lock, release the brakes. Keep steering wheel movements very small while doing this. With this method, you apply the brakes as hard as you can without locking the wheels. You can use the “controlled braking” method or the “stab braking” method. You should brake in a way that will keep your vehicle in a straight line and allow you to turn if it becomes necessary. This is a good response if there is enough distance to stop and you use the brakes correctly If somebody suddenly pulls out in front of you, your natural response is to hit the brakes. If you have a manual transmission, do not push the clutch in until the engine RPM is down close to idle. To apply the air brakes during normal stops, push the brake pedal down. You can find it here: High Road 2.0 5.4 Using Air Brakes Normal Stops New! High Road 2.0! We have a new version of this program. ![]()
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