The Mountain Road is closed today (Sunday) to carry out resurfacing works to a short section of road next to the Les Graham Memorial Shelter.
During a recent joint inspection, the organisers of the Isle of Man Festival of Motorcycling (the Manx Grand Prix and associated events) highlighted serious concerns about the condition of the road which seems to have deteriorated more rapidly than expected due to the recent hot weather.
A section of the road has rippled along the racing line which could adversely affect riders and their machines.
The Department of Infrastructure had intended to resurface this section in September when other works are being planned on the Mountain Road, but in view of the deterioration it decided to bring this element of the work forward under an emergency closure.
The road will be closed between Lheaney Road in Ramsey through to the Creg-ny-Baa between 8am today (Sunday) and 6am on Monday.
The longer closure is to allow the surfacing material to harden prior to allowing traffic back onto it.
Other preparatory works for the event will also be carried out during the closure.
Next week there will also be activity on the Mountain Road.
On Tuesday the road will be closed from Ramsey through to the Bungalow between 9.30am and 2.30pm to allow filming to take place.
Filming is also taking place on the Wednesday, but this will be managed without having to close the road.
There will be occasional delays for people using the road as the filming crews may stop traffic for up to 15 minutes while the filming is taking place.
The filming crew will be on the road from Signpost Corner to Creg-ny-Baa between 5am and 8am, and from the Brandywell junction to Ramsey from 11am to 4pm.
The department says the filming areas will be well signed, and traffic management will be in place, but motorists are asked to take extra care at these times.