Unmarked vehicles patrolling roads throughout TT
The Roads Policing Unit (RPU) says a minority of people are causing problems for the rest when it comes to safety on the roads.
Unmarked police vehicles have caught a number of motorists driving dangerously around the Mountain Course.
Officers have repeated calls for everyone to respect the conditions and drive accordingly.
Sergeant Will Moffatt says police had to close routes off to traffic three times yesterday:
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