One look at the T's rapid transit ridership numbers per mile and you'll see that Boston is desperately in need of some major expansions of rapid transit-type service.
The N-S link with fast I accelerating EMUs is the It's opportunity to do this, and in the process turn every double-tracked CR line inside 128 into something much closer to the WMATA or RER in terms of service and station frequency. You tie Quincy, Brockton, Lowel, Lynn, Salem, Waltham, and Framingham into the rapid transit network through RER-ification and the link and it will do amazing things for the city and our surrounding urban centers.
The N-S link with fast I accelerating EMUs is the It's opportunity to do this, and in the process turn every double-tracked CR line inside 128 into something much closer to the WMATA or RER in terms of service and station frequency. You tie Quincy, Brockton, Lowel, Lynn, Salem, Waltham, and Framingham into the rapid transit network through RER-ification and the link and it will do amazing things for the city and our surrounding urban centers.