Pedestrians will find it safer to cross near a major roundabout on the A27 in Chichester.
West Sussex Highways is extending a footpath in Whyke Road so people no longer have to cross the road so closely to the A27.
The path will take people further away from the busy roundabout, where they can use new dropped kerbs and crossing point.
The extended path connects to the A27 Whyke Roundabout footbridge.
Work starts on Monday, February 6 and is expected to last for four weeks, subject to weather.
Whyke Road will be closed northbound to traffic coming from the A27.
The southbound lane will remain open throughout the works.
West Sussex Highways will complete work in daylight hours.
Advance warning signs and a clear diversion route will be in place.
West Sussex County Council’s Cabinet Member for Highways and Transport, Bob Lanzer, said: “This improvement will make people feel much less exposed when crossing Whyke Road.
“By extending the footpath, there will be no need for pedestrians to be so close to such a busy roundabout.
“It will also be a superior link for the footbridge across the roundabout too.”