One of the biggest problems with Lincoln area traffic came about because of the total confusion when the Humber Bridge was built. The plan was to dual from the bridge all the way down to the A1 via the A15. Most of the land was bought but then the government stepped in and said no, as they were intending to build an East coast motorway linking the bridge to the top of the M11. Two years later this plan was cancelled which left the bridge as a bridge to nowhere with the increased traffic having to use single carriageways to the A1 and South. I believe the East coast motorway plan is back on the cards again.