A gantry spanning the motorway with blue overhead signs showing the following text.
Forward destinations: The NORTH, Wetherby A1(M).
Exit destinations: A63 Leeds, Selby.
Junction number: 42.
A lot of traffic for Leeds will have left a couple of junctions back, aiming for the M62 and M621. But those that remain won't have too hard a time following the A63 from here.