Essex Police issue advice to motorists after heavy rain causes floods on roads

09:53 07 February 2014

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Police are urging drivers to take care if using any sections of Essex roads that may be flooded today and over the weekend following recent heavy rain.

Many minor roads and some major routes across the county have been affected this morning (Friday February 7).

Drivers are advised to avoid using flooded roads wherever possible but if your journey is essential here are some important points to consider.

If you come across a flooded road, you should only attempt to drive through if you are certain that it is not too deep

Know the risks

Many cars will start to float in as little as 12 inches of water. This can be extremely dangerous; as the wheels lose grip, and you will lose control – with the obvious risks and consequences.

The engine air intake on many cars is low down at the front of the car; just an egg cupful of water ingested into the combustion chamber is sufficient to destroy an engine. Water does not compress, resulting in bent or broken con rods or split engine block. Driving too fast, even in relatively shallow water can cause water to be ingested.

Even appropriate fording can cause costly damage. The catalytic converter, (part of the exhaust system) which works at extremely high temperatures, can crack upon contact with cold water, requiring costly replacement.

Avoiding costly damage

Only drive through flood water if you know it’s not too deep. This will be no deeper than the lowest part of the vehicle’s bodywork, (usually the bottom of the spoiler (front panel) or sill panel, (below the doors).

Do not attempt to drive through fast-moving water, such as at a flooded bridge approach – your car could easily be swept away, even at modest depths.

With standing water, physically test the depth of the water with a pole (wade in, if necessary, but only where it is safe to do so), or observe the depth against other vehicles that cross successfully. (Just because they are successful does not mean it is appropriate to follow, see above). If in doubt....don’t!

If you have to drive through water, select a low gear so the engine revs are higher, slipping the clutch if necessary or, for automatic vehicle, select the lowest ratio and balance the throttle and brakes.

Before entering, consider other drivers - pass through flooded sections one car at a time, don’t drive through water against approaching fording vehicles.

Drive slowly and steadily to avoid creating a large bow wave.

Test your brakes as soon as you leave the water.

If you get stuck

If the worst happens and you break down: firstly, ensure the safety of all involved, including other road users. Do not repeatedly try to start the engine, (this may cause further damage). Call for recovery and wait in a safe place.

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