"the line from the south with the tunnel" is the NS Lehigh Line and thats quite busy. They aren't necessarily receptive to hosting pax trains, and that wouldn't be necessary anyway, unless they decided to go all the way into Phillipsburg or westward into PA, and not take the CNJ route and rebuild those last 2 or so miles that are all overgrown past the connection to the Lehigh Line. A station at Exit 7 would be good, plenty of land, and its only probably 2 or 3 miles past NJT ownership line at Ludlow Station Road (MP60 - High Bridge is MP52). The line is intact and relatively clear to this point, as NS cleared their overgrown portion west of Ludlow Station Road early last year. But if you are going to go to Exit 7, why not go to Exit 3, where the line is severed at 78? Building a bridge over 78 is not the worst thing in the world.....and I think if NJT were to go into P-burg, they would probably want to go on their own route and stay off NS as much as possible, if at all.
The line to Flemington isn't necessary intact and walkable. Well it depends on how you are trying to go - if you are referring to the proposed NJT service, It would come down from Bound Brook/Bridgewater more than likely, as the portion of the line to Somerville has some problems - mostly through Dukes Estate. If that were to ever get off the ground, they would probably take the route from Port Reading Junction northeast on the old Reading line to the connection to the RVL at Polhemous Lane, west of Bridgewater. That way, those "pesky" passenger trains would not get in the way in that busy portion inbetween Port Reading Junction and Bound Brook on the LL. Also, if West Trenton were ever to be built, it would probably be easier to build a bridge over the NS Lehigh Line if they were to go that way, down from Polhemous Lane, and stay out the mess that is PR Junction. They could even go and take the route that is I believe the route of the siding to the former Johns Manville plant in Manville - that current huge parking lot with all those cars...I think its an auction? That connects with the RVL just west of Polhemous Lane, past the dump or whatever that place is. The important thing is both those routes have their own bridges over the river.
On the RR, "believe nothing you hear and only half of what you see"
John, aka "JTGSHU" passed away on August 26, 2013. We honor his memory and his devotion to railroading at railroad.net.