The speed cameras in Suffolk have significantly reduced the number of accidents, statistics show.
In 2003, 129 people were killed or seriously injured at current speed camera sites. After the cameras were introduced, the number dropped to 25.
The figures from Suffolk SafeCam reveal that collisions have also dropped from 173 in 2003 to 104 in 2004.
In all, a total of 48,000 motorists were fined a total of £3m for speeding in the county last year.
Terry Marsh, of the Suffolk Speed Camera Partnership, said the speed limits in the county were set with regard to local conditions.
Mr Marsh said on one 50mph dual carriageway at Coddenham, which was an accident blackspot, no-one had been killed or seriously injured since the speed camera had been installed.
"There are still quiet a few people still speeding but if you look at the number of people driving round the county at any one time, it is a very tiny proportion and the number of offences at each camera site has dropped considerably over the last year," he said.