The reconstruction of the Park Street bridge has altered city traffic patterns strongly, in part because many people have long used the street as the route from downtown to 29 north. The furloughed traffic runs through north downtown residential neighborhoods, and Marianne McKernan of Saint Charles Avenue has had enough. She’s launched a petition drive — seeking what, WINA doesn’t say — complaining that the increased traffic has had a negative impact on her neighborhood. The new bridge should be built by December. 09/09 Update: The Hook had a considerably more detailed story about Ms. McKernan a couple of weeks ago.