Manx Utilities needs to repair a low-voltage electrical cable fault
The main route connecting Port St Mary and Port Erin is going to be closed to traffic this week.
From 9am today (8 December), Four Roads will be shut so Manx Utilities can excavate the highway.
It's because of a low-voltage electrical cable fault.
It's due to reopen at 4.30pm on Friday, and the diversion will be via Beach Road to Gansey.
Castletown Confetti Carnival celebrating its 70th year today