Is coasting unlawful for any Commercial Motor Vehicle (CMV)?

Coasting, which refers to a vehicle moving without power from the engine, is indeed unlawful for Commercial Motor Vehicles (CMVs). This regulation is in place because coasting can lead to reduced control and increased stopping distances, especially under adverse conditions. When a CMV is allowed to coast, the driver may not have the necessary power to accelerate or maneuver effectively, increasing the risk of accidents.

The prohibition against coasting in CMVs is aimed at ensuring the safety of both the driver and other road users. By maintaining power to the wheels, the driver is in a better position to respond to changing road conditions, traffic signals, and other vehicles. In addition, coasting can potentially lead to wear and tear on vehicle components, which is particularly concerning in large, heavy vehicles that require precise handling.

The other options suggest varying circumstances under which coasting could be acceptable, but the regulations are clear: for CMVs, coasting is not permitted at any time to maintain safety and control.