Airfield signs are visual aids designed to advise pilots as to their location on the airport and guide operations of aircraft and ground vehicles on the movement areas.

Six types of signs are installed on airfields, each with standardized colors and inscriptions to serve a unique purpose. They are mandatory instruction signs, location signs, direction signs, destination signs, information signs, and runway distance remaining signs.

Mandatory instruction signs have a red background with a white inscription. These signs show an entrance to a runway, a critical area, or a prohibited area. Aircraft and vehicles must stop at mandatory instruction signs until the clearance to proceed is given by the air traffic control tower.

Location signs have yellow inscriptions on a black background with a yellow border. These signs are used to identify the taxiway or runway location an operator is currently on. Direction signs indicate directions of taxiways leading out of an intersection or exiting a runway. These signs have black inscriptions on a yellow background and always contain arrows.

Destination signs identify the direction of taxiways or general direction to a location. They are yellow in background and black in inscription, and have arrows indicating the direction.

Information signs provide the pilot with various types of general advisory information such as applicable radio frequencies and noise abatement procedures. They are yellow with black inscription.

Runway distance remaining signs contain white numbers in a black background, indicating the distance of the remaining runway in thousands of feet during takeoff and landing operations.