When I was involved in the relays around 2000 - 2008 we had Engineering train moves via Hull and also Seamer with nearly all originating at Doncaster. I recall we worked it out that we needed 60 crossings manning out of normal hours on some shifts.
You might get some more detail off RTT.
Have the changes take placeSome work seems to be starting overnight this week and there is supposed to be a blockade 21 February for nine days.
Are more details available?