The Royal Automobile Club Foundation have questioned government proposals to raise the maximum motorway speeding fine to £10,000.
Professor Stephen Glaister, director of the RAC Foundation, said: "This seems such a wholesale change to the system so you have to ask what was going so badly wrong before?
"Ironically we know that speeding offences have declined over recent years and just last week the Department for Transport confirmed that even after taking congestion out of the equation recorded traffic speeds have been dropping for a decade on most types of roads.”
More top news
Scientists claim bubbling magma is behind the 'man in the moon' image rather than an asteroid strike
Our Political Editor Tom Bradby has been tackling readers' questions about David Cameron's conference speech.
Author Stephen Fry has said he regrets his 'pathetic' 15-year addiction to cocaine after writing about it in his new autobiography.