Motorway gantry sign
A gantry spanning the motorway with blue overhead signs indicating one lane exiting and three continuing ahead, and the following text.
Left lane destinations: M62 ; Leeds; Bolton; M'cr (N).
Right-hand three lanes destinations: Preston, Wigan, St Helens M6.
Junction number: 21A.
Here's the eastbound M62, if your destination is Manchester or anything east of the Pennines.