A £1.7m scheme to replace a roundabout near Fleetwood with traffic lights has been branded "a waste of money" by the county's highways chief.
Tim Ashton, Lancashire County Council's cabinet member for transport, said local opinion had been ignored.
Work on the revamp at the A585 between Amounderness Way and the Norcross roundabout is set to begin on 28 February and last for four months.
The Highways Agency, which is behind the scheme, has refused to comment.
Mr Ashton said the new layout, which affects traffic to and from the M55, was "not the right use of public money".
He said: "What upsets me is there has been little or no consultation. The local MPs haven't been informed that this is going ahead nor the local county councillors.
"We need to have consultation about these sort of schemes because the Highways Agency would have found out there is no real support for this and we don't think it is going to work."
He believes they should follow Conservative-controlled Lancashire County Council's lead in talking to residents before going ahead with major roadworks.
He explained: "We were working on a roundabout in Preston last year and going to spend about £2m on the scheme.
"I attended public meetings and listened to local residents, the parish council and local councillors and they told us it wasn't needed and we postponed the scheme.
"We're now re-designing the scheme and this is what the Highways Agency should do."
Mr Ashton added: "They should listen to local people, go away and think about it and perhaps see if the money could be spent better elsewhere."