A new speed limit will be in place on the Douglas to Ramsey Coast Road for this year's TT.
Previously, parts of the route have been derestricted, but a 50mph limit will now be imposed over the festival fortnight.
It's part of this year's road safety campaign, which will see police in unmarked vehicles making sure people are sticking to the limit.
Chief Constable Gary Roberts says those who don't follow the rules will be prosecuted.
Garage to close after more than 50 years in business
Nine questions to be debated in House of Keys this morning
Peel Commissioners hit back at member's allegations
More than £43k in uncashed benefits cheques
Workshop on how to spot depression in children this week
What's to stop migrants using UK scheme to come here?
Island's Gaza vigils to switch days
Old Castletown Road to fully reopen this afternoon