The RAF estimate up to 70,000 people visit the area to watch seals
Calls have been made for action over congestion caused by seal-watchers visiting the Lincolnshire coast.
Donna Nook attracts tens of thousands of people to watch seal colonies during the winter months but also lies next to an RAF bombing range.
Officials said the area's single track roads cannot cope and staff and residents were being affected.
Highways officials said the road had passing places and a one way system but further options were being examined.
The RAF estimated almost 70,000 people, with up to 5,000 a day at weekends, come to Donna Nook in just eight weeks to watch seals and their new pups.
Sqd Ldr Linda Bourne, from RAF Donna Nook, admitted the main problem was seasonal but insisted the situation was getting worse.
"People also come in the summer to watch the aircraft and, if we get the new flood defences, that will create another nature haven and there will be more traffic coming up.
"There are passing bays but you can only get one and an half cars in them and they are already breaking up."
She suggested either widening the road or establishing a park and ride.
Dean Myhill, the county council's area highways manager, said: "Widening would present a major capital expense which would be difficult to justify for a seasonal issue.
"But we are in talks with the Environment Agency about funding connected to the new wetland area and we will look at all ideas put forward."