Before going down a steep grade with a heavy vehicle, what should the driver do?

When descending a steep grade in a heavy vehicle, shifting to a lower gear is essential for several reasons. This technique allows the engine to assist with braking through engine braking, which reduces the reliance on the vehicle's brake system. By engaging a lower gear, the vehicle can control its speed more effectively, thereby preventing the brakes from overheating and fading due to excessive use.

Using engine compression helps maintain a safe speed down the grade, minimizing the risk of losing control. It is crucial, especially for heavy vehicles, where high momentum can be challenging to manage without proper gearing. This method enhances safety by providing better handling and reducing wear on the braking system, which is particularly important during long descents. Overall, starting the descent in a lower gear is a critical and recommended practice for drivers of heavy vehicles.