Investigation work has started on a £65m sea defence project to protect a 2km stretch of coast at Fleetwood.
Preparations are getting underway on the Rossall Coastal Defence Scheme, with construction expected to begin in the New Year.
The work comes as Lancashire County Council said the cost of damage made by lorries to Fleetwood’s roads during the project could stretch into hundreds of thousands of pounds.
The council said it is preparing to make extensive repairs once the project is complete.
Residents are concerned the roads that will be used by vehicles to transport heavy loads over the next three years are not in a good enough condition to cope with the traffic.
Sim Lane-Dixon, Lancashire County Council highways manager for Wyre, said: “We are aware of the condition of a number of roads and of work which may be needed during or upon completion of the three-year construction programme.”
The confirmed route for the deliveries will see vehicles travelling along Amounderness Way before turning onto Rossall Lane and then making their way towards the beach via Broadway and West Lane.
Mr Lane-Dixon added: “We are aware of the proposed works to the sea wall due to begin in the Fleetwood area and have already agreed delivery routes for materials with Wyre Council.”
The Rossall project, led by Wyre Council for sea defences from the site of Rossall Hospital to Fleetwood Golf Club, is part of the Fylde Peninsular Coastal Programme (FPCP), which includes improvements at Anchorsholme.
FPCP has secured £86m in government funding that is expected to be rubber-stamped in the coming weeks, giving the green light for work to begin properly.
The route for transporting heavy goods was chosen to minimise disruption.
Coun Stephen Clarke, who represents Rossall ward, said: “The reason the vehicles go that way is there are no houses on the left side of Rossall Lane.”
Ron Shewan, county councillor for Fleetwood, said: “The council will keep an eye on the situation and if a problem arises they will be right on it.”
Wyre Council says contractors will be assessing the beach and land next to the current sea defences over the coming weeks, with construction work due to begin after Christmas.
It will hold events for residents later this year to explain how the work will be carried out and discuss any concerns.