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:
Government treatment of whistleblowers is 'appalling'
MHK says those raising concerns should be welcomed rather than ostracised
GE26: What matters most to you, one year before the general election?
Thousands of residents to head to the polls a year from this week
Could more of us live in disused shops and offices in the future?
Cabinet Office Minister expects town centre living to feature in consultation
Year of the Manx Language 2026 fund launched
£26,000 for successful projects
Health minister outlines student debt concerns and expanded training for healthcare staff
Claire Christian points to student debt challenges while confirming plans to expand nurse training and maintain medical placements