59CosG95
Established Member
It also helps on the MML that, like the pairing of lines between York & Church Fenton, the tracks are paired by speed rather than direction.The cost of a bit more steel will only be a tiny part of the total cost of getting a structure installed on site. On a four-track railway two tracks can often be closed at quieter times without disruption, as the timetable is planned to work with only two tracks, but getting possession of all four tracks to install a portal is only possible when there is no service or if the service is suspended. The TTC can probably cope with minor realignments, but larger ones will almost certainly need a new pile for either type of structure.
Looking at pictures of the recent MML electrification it's much more easy to accept visually. TTCs are used but they are nearly all of the same type (visually at least) and installed opposite each other.
It also has the advantage of requiring less main steelwork (i.e. masts can be shorter) than the Bonomi equipment.Siemens SICAT is far more conventional, and by conventional I mean sympathetic to the eye and the surrounding environment, being similar to Mk3 electrification.








