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Last Updated: Wednesday, 28 February 2007, 16:35 GMT
Cars slowing for average cameras
Motorway roadworks
The average cameras are used on longer stretches of roadworks
A new type of speed camera being used in Devon and Cornwall has had a dramatic effect in slowing drivers.

Two sets of cameras, with number plate recognition, measure the average speed of a vehicle over a set distance, rather than a single point.

The cameras have been used on roadworks on the M5 in Devon near Exeter and on the A30 at Hayle in Cornwall.

Devon and Cornwall Safety Camera Partnership said the number caught speeding has been drastically reduced.

It would not be exact about the number of motorists caught in the M5 zone per week, but said it was in the "tens" when an ordinary speed camera there would expect to catch hundreds of drivers.

Driver approval

The partnership said it was delighted with the "exceptionally low" figures.

Spokeswoman Natalie Hatswell told BBC News: "It is what we expected, because they've been used in other parts of the country with great success."

Motorists in the region appear to have given the average cameras their backing.

One driver at the Exeter services said: "I think it's a good idea, because a one-off doesn't give you a true picture and I think the average cameras do."

"From start to finish it is probably a more sensible idea and much better than the flash cameras," said another driver.

The average cameras are suitable for longer stretches of road with few junctions, but spot checks with mobile traps and fixed sites will continue on smaller routes.

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