Definition
A standardized system of signs installed on and around airport movement areas that provide pilots with location, direction, instruction, and information needed for safe ground operations. The signs are grouped into six types: mandatory instruction signs (red background, white text), location signs (black background, yellow text), direction signs (yellow background, black text), destination signs (yellow background, black text with arrows), information signs (yellow background, black text), and runway distance remaining signs (black background, white numerals).
Plain English
The signs you see while taxiing at an airport. Their colors and shapes tell you where you are, where to go, what you must not cross, and how much runway is left.
Context Anchor
Seen while taxiing on the ground, reading an airport diagram, or practicing airport operations with an instructor.
Why Pilots Care
Correct interpretation prevents runway incursions and ensures safe, efficient ground movement.
Analogy
They work much like road signs, but the colors and markings are designed for aircraft movement instead of car traffic.
Intuition Check
Do not treat airport signs as casual labels. On an airport, their colors, letters, numbers, and placement carry specific operational meaning for pilots.
Example Sentence 1
The instructor reviewed airport signs with the student before their first solo taxi so they could identify hold-short lines and runway boundaries.
Example Sentence 2
A red and white airport sign marked the hold-short line before crossing the runway.