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:
Court orders return of property seized by police
Deemster agreed searches appeared to be a 'fishing expedition'
Number of bus services cancelled or at risk today
Bus Vannin blames ‘staffing difficulties’
Court to order election recount
Julie Edge has petitioned the court after alleged irregularities in this year's election and result declaration.
Charity to connect elderly people with services at event
Age Concern hopes to inform residents about support available
