Transport Department - Rain, Fog, Wind

Rain and wet roads

When roads are wet braking distances increase because tyre grip is reduced. Give yourself much more room for slowing down and stopping. Your allowance for braking distance should be at least doubled.

Water on the roadway makes a slippery film, especially after a spell of dry weather.

Be on the look-out for difference in road surfaces which may reduce the grip of your tyres still more. The smoother your tyres the greater the increase in braking distance on a wet road.

Pedestrians run the risk of slipping and falling when crossing the road.

See and be seen--You should use headlamps during the day whenever visibility is poor because of heavy rain, smoke, mist or fog or any similar condition.

Not only is your visibility cut down when it rains, it is also more difficult for a pedestrian to see you if his vision is hampered by an umbrella or headwear.

Rain can be so heavy that it forms a thin sheet of water on the roadway. Even good tyres cannot grip through this and you may have no control at all over steering or braking.

Do not drive too fast through pools of water. Water thrown up can block your vision, affect your brakes and stop your engine. It may also affect the vision of other drivers or drench pedestrians.

If the road is flooded stop and find out how deep the water is. If it is not too deep and you decide to drive through, drive as slowly as you can but keep the engine speed up to avoid stalling. As soon as you have driven through a stretch of flooded road, try your brakes.

Wet Road

Fog and mist

Slow down and keep a safe distance. You should always be able to stop within your range of vision.

Do not concentrate on someone else' s rear lamps; it gives you a false sense of security.

Watch your speed; you may be going much faster than you think. Do not speed up to escape a vehicle which is too close behind you.

If you are driving a heavy vehicle it may take you longer to stop than the vehicle ahead.

See and be seen - you should use your headlamps or fog lamps, and rear lamps. In fog,

use rear fog lamps if fitted. Use your windscreen wipers. Avoid using fog lamps in other circumstances.

Check and clean windscreens, lamps, rear mirrors and windows whenever you can.

If you have to drive in fog or mist allow more time for your journey.


Keeping control of your vehicle in strong winds, particularly near high-sided vehicles, demands quick and positive reactions.

Look out for fallen trees and other obstructions in the roadway.

Strong winds can blow pedestrians and cyclists off course, so give them plenty of room.