by atsf sp
It will be limited though. Mostly single track line. There is a siding right after the Charles River Bridge and that ridge can be upgraded to a double track because it once was. Single track would have to be kept in the MIT area because the tracks go through buildings. Plus they will have to combat with the roads and make sure that Mass Ave does not become bumper to bumper. (Reason why all MBTA/Amtrak shifts over the Grand Junction are at night or the early morning.) New switches must be installed to allow fast trains over the line. Plus what is now Beacon Park will have to be upgraded to at least two or three main line passenger tracks instead of one because there is no way to get off that track to the Grand junction without going throught the what is now yard. The switches are near the Market St. Bridge. It would be interesting just will take work.