A blue overhead sign suspended over the motorway from a post on the left, with a downward-pointing arrow indicating the left-hand lane, and the following text.
A6055; (A684) ; Northallerton; Bedale.
Junction number: 51.
For reasons known only to the people who designed this motorway, we lose our left lane to this exit which serves some modest towns and a road in to the Dales, and get it back again afterwards. It can't be that busy because no such thing happens southbound.