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Here are some facts about speed:

'Driver error' is a contributory cause in over 90% of accidents, and driving too fast is a driver error (Sabey, 1993).

20% of rural accidents involve vehicles going too fast for the situation - a further 25% are associated with speed (Sabey, 1993).

4% of urban accidents directly relate to speed - a further 21% are associated with speed (Carsten et al., 1989).

The risk of serious injury rises with small increases in impact speed. The probability of serious injury to a car occupant is three times greater at 30 mph than at 20 mph (Hobbs and Mills, 1984).

At 20mph, 95% of pedestrians hit by a vehicle will survive. At 40mph 85% will die.

A 1 mph reduction in average speed leads to a 5% reduction in collisions (Finch et al., 1994).

Safety camera enforcement of speed limits can reduce vehiclespeeds by 6% and KSIs by 42%.

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