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:
MHK believes there's 'genuine will' to keep Family Library going
Service currently facing closure next month
Government TT messaging 'must be with relevance'
Chief Minister was questioned on the matter this week
Assisted Dying: Westminster has taken 'major step forward', says MHK behind Island's laws
UK MPs vote in favour of legislation for England and Wales
Douglas River Island unaffected by store closures
Company announces closure of 33 UK branches