Warning Signs
Warning signs alert drivers to a hazard ahead so they can reduce speed and increase alertness. Permanent warning signs are red-bordered triangles on a white background (apex up). The yellow-diamond form is reserved for temporary / roadworks warnings — a distinction many secondary sources get wrong.
Common warning signs include the Pedestrian Crossing Warning Sign, Children Sign, Traffic Circle Ahead Sign, Traffic Signal Ahead Sign, Curve Sign, Railway Level Crossing Sign and Slippery Road Sign. Unlike regulatory signs, warnings are advisory — they tell you what to watch for, not a legally compelled action.
Ontology Warning Signs [part-of] Road Signs Signals and Markings Children Sign [part-of] Warning Signs Slippery Road Sign [part-of] Warning Signs
Learning objective
Recognise hazard-warning signs (red-bordered triangles) and respond by reducing speed and increasing alertness.
Question patterns
- What hazard does this triangle warn of?
- Is this a warning (advisory) or a command?
Common mistakes
- Treating a warning as a command to stop
- Calling permanent warnings ‘yellow diamonds’ (those are temporary)
Connections
- Pedestrian Crossing Warning Sign — covers_topic, source: 2026-06-28
- Children Sign — covers_topic, source: 2026-06-28
- Road Signs Signals and Markings — part_of_topic, source: 2026-06-28