Which term refers to the act of halting a vehicle only to pick up or drop off passengers?

The act of halting a vehicle solely to pick up or drop off passengers is correctly referred to as "standing." This term specifically denotes a temporary cessation of movement where a vehicle is not parked but is not in motion because it is actively involved in the process of passenger exchange.

In traffic regulations, standing is typically distinguished from parking, which generally implies that the vehicle is left unattended for a longer duration. Stopping, on the other hand, usually indicates a brief cessation that may or may not involve passenger exchange, such as stopping at a traffic signal. Idling refers to the engine running while the vehicle is stationary, which doesn't specifically relate to the act of picking up or dropping off passengers.

Understanding these definitions is critical for interpreting traffic regulations accurately, especially in scenarios involving passenger transport.