West Sussex County Council is entering the final stage of its three-year programme to change all traffic signals in the county from halogen to LED.
The highway authority said the programme has already successfully converted 70% of the planned sites and will now focus on key areas in Chichester.
As part of the upgrades, the council has carried out extensive refurbishments, replacing all traffic signal equipment and improving underground services to reduce future maintenance.
So far, 331 halogen traffic signal heads have been replaced with LED units, which the council said will reduce carbon dioxide emissions by 23,501kg annually.
The footway areas around crossings are also being enhanced with the replacement of tactile paving, resurfacing and updated signage around toucan crossings.
Further upgrades are also planned for Bognor Regis, Felpham, Littlehampton, Lancing and Worthing.
The council said the project plays a key part in its commitment to become carbon neutral by 2030 and will also significantly reduce the need for annual lamp replacements, saving 993 lamps every year.
Over the lifetime of the LEDs, this is projected to save a total of 9,930 lamp changes.
Joy Dennis cabinet member for highways and transport, said: ‘Switching to LED traffic signals is a major step forward in modernising our roads. By reducing energy use and extending the lifespan of our traffic signals, we’re cutting carbon emissions and lowering maintenance needs – helping create a more sustainable transport system.’
The final phase of the project will see the completion of 27 sites in the 2025-26 financial year, including three junctions and 25 signal-controlled crossings.