Irish weather News

Forecasted rain over the coming week will make roads slippery after the heatwave ends

There are two reasons why motorists should slow down and drive with care on roads that are wet after a heatwave. Firstly, during periods of prolonged hot weather the bitumen in asphalt roads becomes more mobile and can sometime ‘bleed’ through to the surface. This reduces the texture depth and wet skidding resistance. In extreme conditions, like those experienced this summer, councils will apply grit to the road surface to increase its skid resistance. Secondly, dry roads often have a build-up of rubber and oil particles. When it rains these substances can mix with water and create a greasy layer that can become very slippery making the road seem like there is a oil spill.

In wet weather, especially after a dry spell, slow down and keep further back from the vehicle in front of you. When surfaces are slippery or greasy, avoid harsh braking or harsh acceleration – like when you’re driving in icy conditions, gentle manoeuvres are the key to safe driving. If you do find yourself in a skid, don’t slam the brakes, but gradually reduce acceleration, and turn your wheel in the direction of the skid.

Driving fast through surface water is dangerous as there’s a risk of aquaplaning – where your tyres lose contact with the road surface, reducing your steering control.

Remember too that heavy rain can affect visibility on the roads. Keep your dipped headlights on so you can see other drivers, and so they can see you.