What is the proper braking technique when going down a long steep downgrade?

The proper braking technique when descending a long steep downgrade is to press the brakes until you are 5 mph below the "SAFE" speed, then release them. This method helps to avoid overheating the brakes, which can lead to brake failure, while still ensuring that you maintain control of the vehicle.

By braking to 5 mph below the safe speed, you are also allowing for any potential changes in road conditions or traffic without completely relying on your brakes. This technique promotes a steady, controlled descent and makes use of the truck's natural slowing power, which enhances safety.

Engine braking, while beneficial, may not always provide enough deceleration, especially on steep grades, which is why combining it with controlled braking is crucial. Continual hard braking can lead to brake failure, so maintaining a balance is essential for safe driving in such conditions.