The Mountain Road is due to go one way this afternoon
Police are urging visitors and residents to stay safe this TT fortnight and 'make sensible decisions.
It comes as the Isle of Man is preparing for the TT Races which begins on Monday (25 May).
The Mountain Road is currently closed but will open from 4.30pm this afternoon with motorists allowed to drive in the direction of the course.
Superintendent Danny Rotchell and Road Safety Operations Manager Berni Low says preparations ahead of the racing fortnight has been underway for weeks:
Some pubs to stay open for early-hours England match
Tynwald to revisit rates bill after the election
Douglas Council to install temporary play area in Marine Gardens
'Significant work' needed to reduce people entering criminal justice system