In the context of ground traffic control, which term is focused on stopping vehicles or personnel?

The term that is focused on stopping vehicles or personnel is "Hold." In ground traffic control, "Hold" is a directive given to a vehicle or personnel that instructs them to stop and remain in their current position. This command is crucial for maintaining safety and orderly movement on the airport ramp or taxiways, particularly in situations where there may be potential conflicts with aircraft movements or other vehicles.

For instance, if an aircraft is about to taxi onto the runway or if there's incoming air traffic, ground controllers may instruct ground vehicles or personnel to "Hold" until it is safe for them to proceed. This ensures that areas are clear and that no unauthorized movements occur, thereby preventing accidents or incidents on the airfield.

In contrast, the other terms provided do not involve stopping actions. "Taxi" refers to moving an aircraft on the ground to get from one point to another. "Proceed" suggests moving forward or continuing, while "Clear" usually indicates that an area is free of obstructions but does not inherently call for stopping. Thus, "Hold" is the precise term indicating the action of stopping.