How should you proceed when driving a loaded truck downhill?

Explanation

Correct answer: Use the retarder to brake or brake with the engine.

During long descents from hills, such as the one visible in the picture, continuous use of the service brake can lead to it overheating and losing effectiveness. To prevent this and to safely control the speed of a heavy vehicle, endurance braking systems, such as a retarder or engine brake, should be used. They reduce the load on the service braking system, providing a constant and safe braking force throughout the descent.

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