Traffic signals and a pedestrian crossing, at the Weston Road junction on Mile Cross Lane, are to be brought up to Government standards with work starting on Sunday.
The work will start with a road closure, in place between 7 and 9 September, on Weston Road while the carriageway is excavated and duct work laid. A diversion route will be in place via Aylsham Road, Woodcock Road, and Weston Road.
Further work on Mile Cross Lane itself will begin on 7 October. This will include excavating the footpath to lay new duct work, replacing and updating the light controller and replacing posts and traffic signal heads.
The traffic lights will be switched off by Siemens for the duration of the work - expected to take three to four weeks - and temporary traffic lights will be in operation from time to time.
The cost of the upgrade, which is being done in partnership with Norfolk County Council, will be around £77,000.
Disruption can be expected and Norwich City Council apologises for any inconvenience which may be caused by this essential work.