Some stations along the route of the Cape Codder in SE Mass received mini high level platforms and modern lighting. I believe this was a state-sponsored project to add commuter rail service along the route and I think I read that CTC was going to be installed as well, numerous signals were put in but remain "turned away" from rail view. If this is indeed the area you're thinking of, the line is not abandoned and sees regular freight moves and some stations still have pax service, albeit excursion trains.
Did the station look like this?
http://photos.nerail.org/s/?p=50700 http://photos.nerail.org/s/?p=50702 If so, that's the Buzzards Bay station, which was definetly a former Amtrak stop. Some stations along that line are very similar in appearance. Can't think of any other Amtrak station in Mass that is abandoned on 'abandoned-looking' tracks, except perhaps the Northampton "platform" on the Pan-Am "Conn River Line", but that was nothing more than a platform and service stopped in the mid 1980s there.