An apology has been issued for the time Horseshoe Bridge in Spalding remained closed for repairs.
But there was fresh frustration for motorists in the vicinity this week when the level crossing at South Drove closed for a fortnight.
Horseshoe Bridge closed on April 3 and re-opened on Friday after nine weeks.
Drivers had become frustrated at the length of closure and damage being caused to North Drove, part of the diversion route.
Richard Waters, principal structures engineer at Lincolnshire County Council, said: “There were a number of unforeseen complications that created delays at the Horseshoe Bridge site, but the slow rate of progress was not acceptable and I would like to apologise on behalf of the county council and Kier, our contractor.
“I appreciate the frustrations of the public in the area over the length of time the bridge has been closed, but the works were essential for public safety and the continued usage of the bridge into the future.”
Meanwhile, Network Rail says the level crossing closure is for “preparatory work” ahead of a further one in the autumn as part of the £280m GNGE rail upgrade.