The Mountain Road is due to close at 11.15 am this morning as organisers hope to get a full day of practicing.
With last night's qualifying session rained off, today will see the rest of the course close at 12.30pm.
The course is due to reopen at 4.30pm and close again at 6pm after rush hour.
There's then more practice scheduled with roads to to reopen no later than 9.30pm.
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