A shortcut road connecting St Annes to Blackpool is set to be shut for six months – after highways officers discovered it had badly deteriorated.
The single track Wild Lane and North Houses Lane – known locally as The Moss – links Marton Moss with Ansdell and Lytham and is used by thousands of motorists every day.
But it closed last week after council workers inspected the site following calls by the police and found worrying defects in the surface.
A spokesman for Lancashire County Council said: “Owing to weaknesses within the underlying road structure, it is very likely that the road will remain closed for a prolonged period.
“To enable full assessment of the road’s condition and to consider all options, an initial road closure notice has been made that specifies the road will be closed until February 28 next year.”
The well-used road is due to be turned into a dual carriageway as part of the 1,150 homes development in Queensway – but work will only begin once the first homes are in place, which could be several years away.
Fylde Coun David Chedd, whose ward, Park, includes the road, said the situation will only improve once a proper link is in place.
He added: “Although a lot of people use it, it’s not up to the traffic going on it. The only solution is a proper dual carriageway, but that could be some time yet.”