Which type of vehicle may have a safety actuator to maintain a service brake application when parked?

In this context, motorcoaches are equipped with safety actuators to maintain a service brake application when parked. This system is crucial for ensuring that these large vehicles do not unintentionally move when parked, especially on inclines or unstable surfaces. Motorcoaches are significantly larger and heavier than the typical passenger vehicle, and their weight requires additional safety measures to prevent rolling, especially in the absence of the driver.

The use of a safety actuator provides an automatic means of keeping the brakes engaged, alleviating the risk associated with human error in securing the parking brake. This is particularly important for passenger safety, as motorcoaches often carry numerous occupants.

Other vehicle types, like heavy-duty trucks, pick-up trucks, and utility vehicles, generally utilize traditional parking brake systems, which may not have the same automated safety features as those in a motorcoach.