West Sussex County Council’s highways contractor Balfour Beatty is carrying out the works on the north and south-bound carriageways.
The £75,000 scheme will include the renewal of all safety barriers, both on the carriageway edge and the central reservation. Work is expected to take around six weeks.
Lane closures will be as follows:
Lane one (nearside) closures north and south-bound for one week.
Lane two closures north and south-bound for approximately five weeks.
As well as new safety barriers, the following work will also be carried out: road marking renewal, vegetation clearance, inspecting and cleaning all drainage runs, road signs and posts maintenance and renewal as required.