The justice minister says she isn't able to predict the impact proposed 20mph limits will have on speeding offences.
Jane Poole-Wilson responded to a question in the House of Keys this week from Douglas Central MHK Chris Thomas.
She also said existing data from the police and courts about past speeding offences couldn't be analysed in that way.
The minister went on to explain why she personally couldn't make predictions about the future:
Viking longboat races today
Postal vote applications have to be in soon
Mum launches petition over university support
Bus services north and south face disruption later
Wildlife Trust unveils woodland plans
Deadline looms for by-election nominations
Biker in UK hospital after Mountain crash
Trial event closes roads in Peel and Ramsey