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Originally Posted by Minivan Werner
I know those tracks in Evans City are used by heavy rail transporters (or whatever you call them), so I don't know if they could work steady passenger rail around the existing traffic? And since the gauge is different you'd have to switch trains to transfer from the existing LRT to the north end. Although that's not a huge deal.
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So my plan would be to use DMUs. Last I knew you have a couple options for using DMUs on freight lines. If you want to run them mixed, then you have to use FRA-compliant DMUs (which are heavier, less efficient, and much more expensive). However, you can also segregate by time--as in freight only runs at night, commuter by day. In that case you don't need to use FRA-compliant DMUs.
Personally, I would reactivate the plan to run a set of rails up the East Busway in the Strip to around Penn Station, then use the tunnel under the Steel Building into the unused platform at Steel Plaza. This was the same basic gameplan that evolved for possible commuter rail out to Arnold, and indeed could be part of the same overall system with a little coordination on timing. Steel Plaza would then be the transfer point to the T.
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My other concern would be that it wouldn't provide service to any decently-sized population centers. Valencia, Mars and Evans City are pretty tiny. A lot of people might have a Valencia or Mars address but that's mostly due to the sprawl and housing developments outside of it. But Etna & Millvale are a lot bigger.
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So here is the case I would make. Most of the new development up there is sprawly anyway, so you are really going to be relying on TOD to get you walk-up riders, and otherwise you are looking at park-and-rides.
For TOD, places like Zelienople, Evans City, and Mars are actually pretty perfect. They were laid out in the rail era to begin with, they still have some charming historic commercial and residential buildings, and generally speaking are well-suited to becoming "bedroom communities" for Pittsburgh. In contrast, TOD actually works much worse when you place commuter rail lines in or along major highways.
On the park-and-ride side, I would first note I think there is less need for, and indeed would be less use of, a rail line when it comes to people already right along I-79/I-279. If you look at population density maps of the North Hills, however, it becomes clear there are a decent number of people spread out east of I-79/I-279. Seven Fields, for example, is about halfway to Mars from Cranberry. Then you have the line of development around Route 19 from Wexford down through McCandless and Ross, but also the line of development along Route 8 from Bakerstown down through Gibsonia, Hampton Township, Allison Park, and Glenshaw.
This rail line departs Route 8 around Duncan Avenue in Allison Park. So, you could have a station there, maybe at Wildwood Road, and at Gibsonia Road (aka Route 910). That would potentially allow you to serve both these corridors of development--Allison Park would also serve Ross, Wildwood would serve McCandless and Hampton, and Gibsonia would also serve Bakerstown and Wexford. Those Wildwood and Gibsonia stations wouldn't have much around them, but they are strategically located in terms of east-west roads, and ultimately you could look at some TOD as well as park and rides at those locations.
To try to improve times I am not sure I would have a lot more stations. It might be something like:
Zelienople
Evans City
Mars (also for Cranberry, Seven Fields, and Valencia)
Gibsonia (also for Wexford and Bakerstown)
Wildwood (also for McCandless and Hampton Township)
Allison Park (also for Ross)
Etna
Millvale
Strip
Downtown
I think that is about 35 miles total, and without too many stops, I would hope that would take under an hour for the whole line.
Edit: By the way, the line continues past Zelienople through Ellwood City up to West Pittsburg, and from there you could continue up to New Castle. There is also a junction between Evans City and Zelienople that would take you out to Butler. I'm not sure it would make sense to take commuter rail out that far, but you could.