What is the regulation regarding coasting down a grade?

The regulation states that it is illegal to coast down any grade. This rule is in place to ensure maximum control of the vehicle while navigating downhill. When a driver allows a vehicle to coast, it can lead to a lack of control, especially in situations where the driver may need to brake suddenly or maneuver quickly.

Engaging the engine brake, using the gears appropriately, and maintaining a consistent speed are crucial for safe driving on grades, particularly for large vehicles that may require more distance to stop. By prohibiting coasting, the regulation emphasizes the importance of maintaining full control over the vehicle's speed and handling while descending hills, which is vital for preventing accidents.

The other choices suggest scenarios that may involve coasting, but they do not align with the regulations designed to promote safe driving practices.