The Department of Infrastructure is asking people to curb their speed - as contractors repaint racing course kerbs.
This week sees work starting on touching up the black and white paint on kerbs around both the Mountain Course and the Billown Circuit.
The DOI says depending on where the work is taking place, there may be temporary speed limits, stop and go boards, or temporary traffic lights.
It's asking motorists to slow down, be vigilant and stick to speed limits in order to protect workers.
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