The MBTA plan for the station shows two entrances: one on the lower level of the station facing the D2 parcel and a second upper-level entrance on the top of the Prospect Street bridge over the tracks. However, one open question is what should be build immediately adjacent to the new Green Line station (north of the tracks) on the D2 parcel. The MBTA plans show a circular drop-off area next to the lower level entrance of the T station. (A drop-off area within 100 feet of an entrance is required to meet accessibility requirements, and the upper level entrance doesn't have enough space to accommodate a passenger loading zone.)
But is a circular drop-off area the best use of the land directly next to a T station? Are there other alternatives that would still meet the requirement to have a passenger loading zone within 100 feet of an entrance? One option would be to widen the Prospect Street bridge, which would allow for a passenger loading area on the top of the bridge, but that could be years away and expensive. Other ideas are sketched out below. For example, what if Charlestown Street was connected to Prospect Street through the D2 parcel? That might allow for a passenger loading zone along Charlestown Street, particularly if the T station entrance could be bumped out to meet up with the newly constructed Charlestown Street.
What do you think? Do you have other ideas? Comments encouraged. (Note that the drawings include a rear "headhouse," which is not in the MBTA plans. They also include ideas about potential building locations and park space, all of which are still up for discussion.)