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:
Does it matter where your MHK lives?
82 candidates confirmed to contest House of Keys General Election
Island-based charity says 'difficult days ahead' in Nepal
Hundreds dead following devastating flash floods
TT racer to complete 'the lap he never got to finish'
Tribute lap organised for former MGP winner Daniel Ingham
Glenfaba and Peel candidate withdraws from General Election
Trevor Cowin no longer standing
