A public consultation on a new motorway junction will be held again after a questionaire did not offer the option to object to the proposal.
People were asked by Essex County Council to register their views on a proposed new M11 junction at Harlow.
But although participants were offered three different routes for the junction, they were not given the opportunity to say they opposed the plan.
The council’s highway cabinet member, Rodney Bass, said the gaffe was down to a technical error.
The new junction 7A would be on the north east side of Harlow, just south of Sheering.
Plans were supported by Robert Halfon MP who says that congestion is crippling the town at rush hour.
The new junction is scheduled for completion in 2020-21.