Symbolic warning signs
Tunnel (W35)

Slow down and switch your car’s headlights on in the dim position.
Where
On any road especially in mountainous areas.
Purpose
To warn that there is a tunnel ahead.
Action
Slow down and switch your car’s headlights on in the dim position.
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Other symbolic warning signs
- Traffic signals ahead (W22)
- Traffic control “YIELD” ahead (W23)
- Traffic control ahead (W24)
- Scholar patrol ahead (W25)
- Pedestrian crossing (W26)
- Pedestrians (W27)
- Children (W28)
- Pedal Cyclists (W29)