A study of clamping in the Dublin City Council area shows that one motorist had been clamped 63 times in the four years up to last December.

The survey looked at the cars clamped in 2012 and looked back to see how often they were clamped in the three previous years.

Just over 70% of vehicles had been clamped once, over 2,000 cars were clamped more than five times and four were clamped more than 50 times.

Liam Keilthy, Independent Parking Appeals Officer for Dublin City Council, has said the results show that the current fee, which was introduced more than 12 years ago, is no longer the deterrent it once was.

Speaking on RTÉ's News At One, Mr Keilthy said when adjusting for the consumer price index, the release fee should have risen to €130 in order to maintain the deterrent effect.

His comments come ahead of new laws to regulate the clamping industry.

There is to be a cap on how much private clamping companies can charge motorists to release their vehicle and the new bill also includes the licensing of all operators.

The heads of the bill have been published by Minister for Transport Leo Varadkar, who said they would eliminate rogue operators.