Construction begins today on re-routing the cycle path at West Park.
The stretch between Le Fregate and the junction with Gloucester Street is being moved to make the area safer.
The footpath along the the Esplanade will become for pedestrians only.
The work is expected to take a month. It will be done 8am-6pm Monday-Friday.
The cycle track will be re-routed to behind the existing wall that marks the north eastern boundary of Les Jardins de la Mer.
A bus shelter will be put in at the Esplanade bus stop.
People walking and cycling in the area are being advised to take extra care over the next four weeks as they will have to share the path in front of the old sea wall.
"This work, which was in the pipeline prior to lockdown, is an example of how we are developing infrastructure which is easier and safer for Islanders to use, and which ultimately encourages more people to switch to sustainable forms of transport.
"Changes like these will cumulatively enable us to have a transport system that actively improves the quality of life in Jersey by making cycling safer, simpler, and more appealing." - Minister for Infrastructure, Deputy Kevin Lewis

Government appoints new Havre Des Pas Lido operator
Jersey Chamber of Commerce 'aghast' at recommendation to reject Strive Hotel plans
Politician calls for Havre des Pas lido tender process to be scrapped
Two Jersey rowers make Team GB
Jersey's rate of inflation rises slightly over summer
Committee calls for Deputy Philip Ozouf's suspension
Baby sloth at Jersey Zoo orphaned as mother unexpectedly dies
DFDS contract reveals termination clause and performance penalties