Pinner View in Harrow has been shut since 12 October because of gas infrastructure work ordered by Harrow Council.
The temporary closure is expected to continue until 27 November, although it could remain in force for up to 18 consecutive months if the utility project has not been completed by then.
Cadent is carrying out the gas works.
During the closure, vehicles are prohibited from entering or leaving Pinner View where it meets Headstone Gardens, Kingsfield Avenue and Cunningham Park.
Parking restrictions will also apply on Headstone Gardens, Cunningham Park, Kingsfield Avenue, Pinner View and Victor Road.
Diversion routes have been established for traffic affected by the restrictions.
Access will remain available for emergency service vehicles, vehicles involved in Cadent’s utility work and vehicles requiring entry to properties within the closed area.
Harrow Council said the order would take effect only when the required signs under the Traffic Signs Regulations and General Directions 2016 had been displayed, removed or covered, or when directed to do so by a uniformed police constable or civil enforcement officer.