The Mountain Road will be closed from 9:30am today for the next three weeks.
The Department of Infrastructure is carrying on with planned works which started during last week's closure.
This includes TT preparations such as the installation of one way signage, race safety equipment and marshal and filming points.
Victory Café, the Creg ny Baa, Snaefell Mountain Railway and Summit Café will all be open as usual throughout the closure.
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