One problem is that NIMBYs tend not to be open to rational discussion. To many NIMBYs a train is a train, and you can't convince them that there is a difference between a Stadler DMU and, say, a unit train of crude oil. Besides, you can't have trains running on those tracks -- children play there!
BrandeisRoberts wrote: The idea of a simple, NJT Riverline-style service with Stadler GTW's running single-track in places to keep station costs and land takings to a minimum while playing nice with pre-existing bikeways seems like a real magic bullet that could restore service to places like Arlington, Bedford, or the Central Mass Line while ruffling a bare minimum of feathers in the process.Your basic suggestion would make sense in a more rational world, but you picked some non-optimum examples of where to implement it. The former B&M Bedford Branch right-of-way isn't wide enough to support a track alongside the Minuteman Bikeway, and there is zero chance that the trail/bike lobby would let the route be reclaimed for a rail line at this point. As for the Central Mass, the NIMBYs in Weston so hate outsiders breathing their private air that they've even blocked trail use for the dormant Central Mass. A trail might bring in Those City People, you know.