World Traveller
I bridge over a railway line will not be built over time; I expect that this section will be built in the adjacent site compound and lifted in to position in one go during a weekend track closure.
Sorry you have lost me as these photos shows the bridge already straddling the 4 tracks. It was built in sections during the spring and was erected 2 tracks at a time overnight with the middle platforms providing supports. It is now being clad in situ.
This is the first part of a video showing the bridge being built and erected
This was taken 7 months ago showing the 6 support columns.
This photo was taken on 27th September.