I have to take an opposite position.
I think that there is enough freight in and out of New England to support an integrated truck/rail system that uses distribution centers located all over the northeast. If you go out on the Mass Pike and sit at a rest area for an hour, you will count over 500 trucks passing one way. There are 500 going the other way too. If you could move 5% of that to rail, you would generate a pig/container train with about 300 cars in each direction, each day.
Locate these distribution facilities next to exiting tracks. Basically, you need a couple of sidings, a paved parking lot, and some loading/unloading equipment. That vacant lot shown in the picture in Nashua would be perfect. Trailers are loaded at a local industry, trucked over to the distribution facility, loaded on a flat car, and moved to a major yard for consolidation into a single train. The opposite happens for the reverse move. This happens twice a day.
Since Guildford and CSX won't want to send out a loco to pick up a couple of cars, allow the ditribution facility mainline access to move their own cars a loco to the main yard. The crew, loco, etc. belong to them, and they have operating rights on the host RR. The host RR could recieve some payment for this use. It is up to the distribution Co. to pick up and deliver 6-12 cars on each trip to the main yard.
At start up, distribution facilities are partially funded by state and local funds to get the trucks off of the highways. When the system starts to turn a profit, part of that goes back to the state to fund another new distribution center. Every major highway has a number of crossover points with all of the major rail lines in the area, and I will bet that there is an abandoned industrial park near every one of them where you could locate a distribution center. As you run out of active connections, then you add back in abandoned ROWs or lines with no freight at this time.
It won't happen overnight, and it won't happen without some help from your taxes, but I would rather fund something like that versus another lane on Rte.128.
Engineer999