On a rural lane you pass a triangular warning sign with a red border showing a car's wheel sinking into the ground at the edge of the road. What is this sign warning about, and what should you avoid doing as a result?
- It warns that the ground at the edge of the road is soft and may not support a vehicle's weight, so you should stay on the main carriageway and avoid pulling onto the verge
- It warns that the road ahead has recently flooded and the surface may still be wet, so you should slow down to avoid aquaplaning
- It warns of an unfenced quarry or excavation beside the road, so you should keep well away from the edge of the tarmac at all times
- It warns that the road ahead narrows to a single track with passing places, so you should be ready to pull over to let oncoming traffic pass
Why A? And why not the others?
Correct answer: A. It warns that the ground at the edge of the road is soft and may not support a vehicle's weight, so you should stay on the main carriageway and avoid pulling onto the verge
This is the 'soft verges' warning sign, which shows a wheel sinking into the ground to depict the specific hazard it addresses: the strip of ground beside the paved carriageway may be loose soil, gravel, or grass that has not been reinforced to bear a vehicle's weight, so a car that pulls off the hard surface risks sinking, losing traction, or becoming stuck. The sign's advice follows directly from that hazard: stay on the made-up carriageway and avoid stopping or pulling over onto the verge, rather than slowing down for a wet or flooded surface, which is a different hazard with its own separate warning sign. It is not a sign for an unfenced quarry or excavation, which would instead be shown by a sign depicting a falling or crumbling edge rather than a wheel sinking into ground, and it is not the single-track-road-with-passing-places sign, which uses a completely different pictogram showing a narrowing road rather than a sinking wheel.
Source: DfT Traffic Signs Manual, diagram 556.1 — Soft verges ahead (GOV.UK)