OpenTest

Road surface

Practise questions on this topic

The surface under your tyres decides how much grip you have, and it changes more often than you'd think. Whenever it changes, adjust — different surfaces handle very differently, especially when wet.

Asphalt

Smooth black asphalt gives good grip when dry, but its skid resistance drops in the wet — slow down and take extra care when it's raining.

A sealed road surface.
A sealed road surface.
A sealed (asphalt) road surface — generally good grip.
A sealed (asphalt) road surface — generally good grip.

Chip-seal

Where chip-seal has worn smooth, grip is reduced, so watch for those polished patches. On newly laid chip-seal, slow down — loose chips can increase your risk of skidding.

Unsealed and gravel roads

Gravel (loose metal) roads have very low skid resistance, and loose stones can chip or break a windscreen, so take extra care and adjust your speed. Following another vehicle on a dry gravel road, increase your following distance to stay back from the dust cloud, which cuts your visibility.

An unsealed gravel road — reduced grip; slow down and avoid sudden moves.
An unsealed gravel road — reduced grip; slow down and avoid sudden moves.
Start free practice test