Motorway gantry sign
A gantry spanning the motorway with blue overhead signs showing the following text.
Forward destinations: Preston, Wigan, St Helens; Liverpool, Warrington (North); Leeds, Manchester (North) M6 .
Exit destinations: A57 Warrington (Ctr & East), Irlam.
Junction number: 21.
We're crossing in to Lancashire which is very densely populated and has a dense web of motorways too. The result is the long list of places that appears on this sign.