More than two thirds of people support 20mph zones outside schools according to a poll by the Institute of Advanced Motorists.

A further 38% of nearly 4000 people questioned said 20mph limits should be used on roads with parks and shops – but only a quarter would like to see a 20mph limit imposed on all built-up areas.

IAM head of road safety, Kevin Delaney, said: “The IAM supports the selective use of 20mph speed limits where there is clear evidence that the risk of casualties will be reduced.”

When asked how the speed limits should be enforced, respondents were less keen: 40% said 20mph limits should be signalled by signs and enforced by police, but only 20% agreed with safety cameras and 21% approved of road humps combined with cameras.

Delaney added: "Passive enforcement measures, such as speed bumps, are unpopular and active enforcement by police is unrealistic in the current financial climate."

Author: Andrew Brady