Motorway fork sign
A blue sign with a diagram showing a branch off the road ahead and the following text.
Forward destinations: The SOUTH; London; Northampton.
Exit destinations: Lutterworth; A4303 [Solid triangle diversion symbol] [Solid square diversion symbol]; Rugby; (A426).
Junction number: 20.
A long ten-mile run brings us to junction 20, most of it beside the former alignment of the Great Central Railway. When the motorway was built you would still see express trains running alongside.