Which sign type would provide instructions specifically for vehicle movement?

The correct choice is the Mandatory Instruction Sign, as this type of sign provides clear directives that must be followed by vehicle operators in the airside area. These signs include important commands such as “STOP,” “NO ENTRY,” and “YIELD,” which are crucial for ensuring safe and orderly movement of vehicles on the airfield.

Mandatory Instruction Signs are specifically designed to convey authoritative instructions that impact how, when, and where vehicles can move. These signs help prevent accidents and miscommunication in the busy environment of an airport, where both aircraft and vehicles operate concurrently.

In contrast, Stop Bars are used to indicate where vehicles must stop, but they do not provide broader movement instructions. Taxiway Directional Signs are intended to guide vehicle operators towards specific taxiways or runways, but do not impose mandatory instructions. Runway Edge Lights serve an entirely different function by marking runway boundaries for flight operations and do not relate to vehicle movement instructions.