Essential maintenance will be carried out on the Mountain Road next week.
It will be shut for five days to allow work on two collapsed culverts.
Materials left over from the Festival of Motorcycling will also be removed during this time.
The course will be closed from 9.30am on September 17th to 4pm on September 21st.
Parking will be suspended through Laxey at key points through this time to help the flow of commuter traffic.
Access to properties will be maintained.