The Mountain Road is one way from Ramsey to Douglas for the duration of TT fortnight.
It was introduced at the Centenary TT in 2007, to try and eradicate head-on collisions.
Inspector Terry Stephen of the Roads Policing Unit says despite the change, people still need to drive and ride responsibly up there:
New minister promises to remove 'unnecessary barriers' to housing
Rob Callister appointed as new Housing and Communities Minister
Plans submitted for temporary marquee at Milntown
Estate says if approved it would help generate more income
"I can't believe it!": Manx contestant stuns Countdown hosts with record-breaking run
Hazel Drury becomes highest-scoring female "octochamp"
'Stay on top of web maintenance' to prevent future issues
Advice issued to Manx businesses following cyber security flaw
