Road Sign Colour Code
The road-sign colour code is the authoritative SARTSM logic (Vol 1 §4.1.5) for reading signs at a glance. Across all classes, a white background means a permanent sign and a yellow background means a temporary (roadworks) sign. Within regulatory signs, blue = a command (‘you must’) and a white circle with a red border = a prohibition (‘you must not’).
For guidance signs the colour map is more precise than the common K53 simplification: ordinary freeway and rural direction signs are GREEN (white text, yellow route numbers); BLUE is reserved for the highest-class A1 freeway direction signs; urban/local direction is WHITE with a blue border; and tourism is BROWN. The widespread teaching that “rural direction = blue” is a misconception — SARTSM makes them green. Information signs default to a green background with a white border. This note underpins Guidance and Information Signs and connects back to Regulatory Signs and Warning Signs.
Ontology Road Sign Colour Code [part-of] Road Signs Signals and Markings Road Sign Colour Code [defines] Guidance and Information Signs Road Sign Colour Code [contradicts] K53-Test.co.za
Learning objective
Apply the authoritative colour logic for SA signs and avoid the common ‘rural direction = blue’ misconception.
Question patterns
- What does a brown sign indicate?
- What colour are freeway direction signs?
- White vs yellow background — permanent or temporary?
Common mistakes
- Teaching rural direction signs as blue (SARTSM: they are GREEN; blue is reserved for top-class A1 freeways)
- Forgetting yellow background = temporary
Connections
- Guidance and Information Signs — relates, source: 2026-06-28
- Regulatory Signs — relates, source: 2026-06-28
- South African Road Traffic Signs Manual — derived_from_source, source: 2026-06-28