Quote:
Originally Posted by electricron
Being not familiar with this particular project in Pennsylvania specifics, I'll just leave my comments to suggesting hanging an overhead catenary is far cheaper to implement than installing a third rail system.
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here's the issue: the chestnut hill west line is an existing commuter rail line, powered by overhead caternary lines. I am suggesting (and it is not my original idea but one that's been around for decades) to make it a part of the Broad Street subway line, which is powered by a third rail. if we are getting new "metro style" trains, and raising the platforms, which this report suggests, my question is whether to extend the subway line's third rail to power the trains along the commuter rail portion. otherwise they'd have to run caternary lines in the subway, which I don't think is technically feasible. a third option is to have trains that can be powered by both systems, switching between caternary and third rail as necessary.
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