The Havre des Pas roadworks will take longer than planned.
Asphalt can't be supplied because of technical issues at the Ronez manufacturing plant.
The main resurfacing part of the work has been paused until the problems with the plant are fixed.
The work started on 10 January and was due to take seven weeks to complete.
A government spokesperson says the road will stay closed for safety reasons - and the site team is working on contingency plans to limit delays and the impact they have.
Questions were asked of the Infrastructure Minister in the States Assembly last week about how to mitigate the disruption caused by the work.
Deputy Kevin Lewis said his officers were talking to the contractor every day to make sure it is done as soon as possible.
£75,500 raised in Jersey Christmas Appeal Charity Auction
Government to announce support option for carers
Drink driving can cause 'life-changing' consequences
Parked cars damaged in Victoria Avenue crash
L'Ecume II: Lewis Carr jailed for 20 months for fatal collision at sea
Guernsey's former Chief Minister admits making indecent images of children
Minister approves 42 sheltered homes at nursing home
Jersey potato farm to be the site of Channel Islands' largest roof solar array
