Why are roads especially slippery when it first rains after a dry spell?
Right.Not quite. The answer is C.
The first rain lifts grime into a slick film, so take extra care.
Source: Safe driving practice
Warning sign · Surface and hazards
Slippery road warning sign
The road surface ahead may give poor grip, especially in the wet.
Asked in road safetyAsked in general knowledgeShown in one practice questionAdvisory: it warns, it does not command
What it means
What does the slippery road sign mean in NSW?
The picture shows a car from behind, with two wavy tracks curling out under its wheels as if it is sliding. It marks a stretch where tyres lose grip more easily: smooth or polished seal, shaded corners that stay damp, or a surface that turns slick when wet. The first rain after a dry spell is the worst moment, when oil and dust lift into a greasy film.
What to do
- 1
Slow down before the stretch, not while you are on it.
- 2
Brake, steer and accelerate gently so the tyres keep hold.
- 3
Leave a longer gap behind the car in front.
A practice question with this sign
Common questions
- Why are roads more slippery when it first rains?
- Oil and dust that built up in dry weather mix with the water and form a slick layer.
- What should you do if the car starts to slide?
- Come off the accelerator and steer smoothly towards where you want to go, without sudden movements.
More in surface and hazards
Your L plate turns green when you would pass
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