According to WalkScore.com, Boston is America's third most walkable city, behind San Fran and NYC. The city ranking system is slightly unclear, but appears to be based on averages of neighborhood walkability, or perhaps numbers of most walkable neighborhoods. Walk Score says Boston's best areas for walking are the Back Bay, Beacon Hill, Fenway, and the South End. Somewhat ironic that a wonderful walking city is in massive transportation debt.......

Some Bostonists found out about this the hard way--by actually being on the green line and having our drivers announce "last stop Government Center"--but the Green Line is closed between Park Street and Kenmore Square this morning after two trolleys collided at Boylston. One trolley rear-ended a stopped trolley, and one car derailed, according to the Globe. Not only were legions (including some Bostonists) made late for work, but the Globe reports nine people complained......