Which factors should influence your choice of speed when starting down a steep downgrade?

When starting down a steep downgrade, the most critical factors influencing your choice of speed are total weight, road conditions, and the steepness of the grade.

Total weight is significant because a heavier vehicle requires more distance to stop and is more likely to accelerate faster down a hill due to gravity. Thus, understanding the weight of your vehicle and cargo helps determine a safe and controlled speed for descending.

Road conditions, such as whether the pavement is dry, wet, icy, or has loose gravel, also play a crucial role. Poor road conditions can drastically affect brake performance and vehicle control, leading to an increased risk of accidents if speed is not adjusted accordingly.

The steepness of the grade is vital because steeper grades can lead to faster acceleration and greater demands on your braking system. Knowing the steepness can help you select a speed that allows for safe maneuvering and control throughout the descent.

Together, these three factors are essential for establishing a safe speed that minimizes the risk of losing control and ensures the safety of the driver, passengers, and others on the road. Other options do not adequately consider the operational aspects critical for safe vehicle handling on downgrades.