New York's 4th Regional Plan Suggests some Streetcar Routes for NYC but does not give details.

This map comes from the NY Regional Plan (4th) where the blue lines are proposed light rail\streetcar routes (other than the BQX).   I could not find out more information about the proposals.  The blue line from Bay Ridge to Marine Parkway Bridge; is that line going down 65th Street?  What about the other lines; is that a concourse line in the Bronx?