The Department of Infrastructure is asking people to respect temporary speed limits on the Mountain Road during TT.
A series of limits on the one-way route will be in place over the festival fortnight.
They include 50mph between the Ramsey Hairpin and the Gooseneck, 60mph between Keppel Gate and the Creg-ny-Baa and from Lanjagan Lane to Hillberry.
There'll also be a 40mph limit between the Creg-nyBaa Back Road and Lanjagan Lane.
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