The problem with Salford Crescent Station is that it was built on the cheap, and sadly not quite in the right place. It was inteneded at first that there would have been 4 lines trhough the station with two island platforms, at the current location. Before the station was built, there where in fact 6 lines in this area. Four went through Pendleton Broad Street and on up the Atherton line and tow through Pendleton Old, and up the Bolton line.
After a lot of messing about, insead of 4 lines and 2 island platforms, we ended up with 3 lines and 1 island platform. With the space that was wasted, the single island platform could have been twice as wide as it is, I watched it being built as I travelled between Bolton & Manchester going to work in the 80's. At that time I could not believe how narrow the platform would be. They also provided 2 reversing sidings between the two through lines. They have been rarely used and now I believe they are totally unused.
They should have built the station with platforms on both running lines, to the north of the junction, this would have kept 4 running lines through the location, 2 for Victoria and 2 for Oxford Road, also a bay platform for reversing trains that pass through Victoria from the Calder Valley, giving a good interchange between the various croos Manchster lines. Plus I am sure that they weren't thinking straight when they closed two platforms at Salford Central. While I accept that when the Windosr Link opened, that there were less trains and traffic to Victoria, why did they not realign the ex LNWR tracks through the Station, giving Salford Central a service to Liverpool and North Wales.