A popular route in Wroxall is to shut for around 10 weeks of works.
St John's Road will be temporarily closed both ways from Monday (18). It is not expected to reopen again until April 8.
The closure will be in place allow SGN to carry out repairs to its gas network.
Through traffic will be diverted via Shanklin Road, Victoria Avenue, High Street, Church Road, Cowleaze Hill, Bonchurch Road, Leeson Road, St Boniface Road, Mitchell Avenue, Ocean View Road, Newport Road and the B3327.
Redhill Lane, at its junction with Appuldurcombe Road, will also shut. SGN says the road is not wide enough for traffic to use as a diversion route.
Resident access will be maintained to both roads at all times.