What does a flashing red light or two alternately flashing red lights on a traffic light indicate?
Signage: Traffic lights
Explanation
**Flashing red lights** on a traffic light indicate that passage is **temporarily prohibited**. These lights are used in specific situations, such as before a level crossing or a bridge, to warn drivers that they must stop and wait until it is safe to proceed.
- **Solid red light**: Permanently prohibits passage while it is on.
- **Solid yellow light**: Also prohibits passage, but allows vehicles that cannot stop safely to continue.
- **Flashing yellow lights**: Require yielding the right of way, but do not prohibit passage.
Therefore, when you see a flashing red light or two alternating flashing red lights, you must stop and wait until the lights change, as passage is temporarily prohibited.
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