No impact to public during exercise
The Snaefell Mountain Course's electronic flag system will be tested today (12 August).
Signs - which are based at points around roads on the TT Course - will illuminate simultaneously between 7am and 9am.
It's ahead of the Manx Grand Prix which begins on Sunday (16 August).
There will be no impact on public road access and road users do not have to take any action.
Clerk of the Course Gary Thompson says the two-hour period in which the test will take place has been chosen to 'minimise any disruption' and is thanking residents and motorists in advance for their patience.
You can see the schedule for this year's MGP and Classic TT HERE.
Praise for rape victim's 'remarkable courage' after attackers are jailed for second time
Three men who raped teenager in flat jailed
Negotiators used to resolve 'peaceful protest' at prison
Digital ID firm goes into liquidation