Symbolic warning signs
Slow-moving heavy vehicles (W39)

Slow down and, particularly in mountainous areas with sharp curves, be able to stop within the distance you can see. Remember to allow for a longer stopping distance on a descent especially when your vehicle is heavily laden.
Where
Especially in mountainous areas.
Purpose
To warn that heavy vehicles travel slowly down a descent.
Action
Slow down and, particularly in mountainous areas with sharp curves, be able to stop within the distance you can see. Remember to allow for a longer stopping distance on a descent especially when your vehicle is heavily laden.
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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)