Why is coasting considered unlawful for CMVs?

Coasting in commercial motor vehicles (CMVs) is considered unlawful primarily because it reduces control over the vehicle. When a driver allows the vehicle to coast, they are not actively engaging the engine braking or maintaining engine power, which diminishes their ability to respond quickly to changes in the driving environment. This loss of control can lead to dangerous situations, especially in emergency scenarios where the driver must react promptly.

Maintaining control is crucial for CMV drivers, given the size and weight of these vehicles. They require greater stopping distances and more meticulous maneuvering compared to standard passenger vehicles. By not actively using the engine to assist in maintaining speed or slowing down, a driver’s reaction time is compromised. Therefore, ensuring proper control at all times is paramount for the safety of both the driver and others on the road.

Other options, while they may present certain truths in different contexts, do not align with the primary safety concerns that govern CMV operations. For example, while coasting may save fuel and some believe it could increase speed, these factors do not override the critical importance of maintaining control over a CMV. Hence, adherence to safety regulations in this regard is essential for preventing accidents.