If you get red-flagged on the TT course tomorrow, don't worry - it's just a test.
TT organisers say they'll be trying out the electronic flag system around the course in preparation for next week's festival.
The digital lights system will be tested between 6.30am and 7.30am tomorrow (Friday, May 22).
The displays are at flag points around the course and will come on simultaneously during the test - but road users don't need to take any action.
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