Officers have focussed on the issue over the last two weeks
Sixteen arrests have been made in relation to drink or drug driving during the Manx Grand Prix and Classic TT period.
The Island's police say the roads have been busier during the racing fortnight.
The Isle of Man Constabulary says it's an issue officers have been focussing on throughout.
Inspector Elliot Butler says there'll be further analysis to determine the split between locals and visitors:
Meningitis B vaccination scheme to be rolled out on-Island
Programme is for eligible Year 13 students and under-25s
Balthane Roundabout plans on hold until 2027/28 as costs rise
Price tag has jumped up by £600,000 since scheme was first approved
Port St Mary lifeboat launched to rescue stricken fishing vessel
RNLI crew tows vessel back into harbour
Enquiries ongoing after 'shotgun-like sound' heard near Police Headquarters
Police say there's no indication of any wider risk to the public