Nearly 1,700 drivers, wrongly fined for speeding in south Devon, will be reimbursed this week.
More than £100,000 is due to be repaid after errors in the use of a mobile speed camera on the A379 at Starcross between November 2002 and March 2005.
Last year, a judge threw out cases against four drivers because the speed limit signs were too far apart.
About 150 people being repaid by credit card will have their money back in the next couple of weeks.
The Courts Service took on five extra staff to help process the refunds.
The Devon and Cornwall Safety Camera Partnership, which operated the cameras at Starcross, said its first priority was to remove the penalty points from drivers' licences.