What effect does a wet road surface have on a vehicle’s braking ability?

It reduces the braking distance of that required on a dry surface.
Modern tyres provide grip on a wet road as effectively as on a dry road.
It makes no difference to the required braking distance.
Generally, it doubles the braking distance of that required on a dry surface.

Explantion: When it is wet, your tyres do not grip the road surface as well as when it is dry and your stopping distance is increased. For these reasons you should slow down during or after rain and keep a greater distance from the vehicle in front.

Theory Tester

What effect does a wet road surface have on a vehicle’s braking ability?

Managing Risk