edwin_m
Veteran Member
It's possible to electrify a route without locking it in to its current form, but it needs a clear plan of what its future form is going to be.
It just means being careful with the positioning of masts, moving signalling equipment into the correct positions and fitting portals and twin track cantilevers instead of single track cantilevers. The way the fourth tracking at Huyton has been prepared is indicative of what can be done.
It is of course sort of moot if there's to be tram operation instead, but tram-train operation could make use of 25kV AC using the Vossloh Class 399 type trams Sheffield have acquired, and allow shared operation between NR and Blackpool trams, though I don't know how floor height issues can easily be overcome without completely rebuilding the route for trams.
Presumably enough of the junction at Kirkam will be wired that electrification to Blackpool South could be done at a later date if approved, without any further disruption to the North service.
Any tram-train on the Blackpool South line would presumably connect to the existing tramway near Pleasure Beach, and it would be easier to replace high platforms with low ones south of there than try to add high platforms on the sea front. Therefore it would be a low-floor tram-train as per Rotherham, not a high-floor one like Manchester are considering. Separate high and low platform sections would be needed at Kirham and at Preston if the service continued to there, on the same or different tracks. Salwick could probably be made tram-train only, as its service is pretty minimal.
Dual-voltage tram-trains would be needed unless the service only ran as far as Kirkham and had its own dedicated track there (in which case it wouldn't even be a tram-train). Between Kirham and the tramway junction in Blackpool either voltage could be used but 25kV would probably be preferred because it could be fed from wherever feeds the Preston-Blackpool line, whereas the DC option would need several new substations. This section would most likely become tram-only, allowing simpler signalling on the one or more passing loops that would be needed to provide a decent service. However it might still be part of Network Rail with trains visiting under possession for engineering work.
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