A bridge in Ridgefield carrying traffic over the Norwalk River will be closed soon.  Depot Road bridge, the northern entry to the Branchville train station, has deteriorated.  First Selectman Rudy Marconi said during the recent Board of Selectmen meeting that the state has told the town to close it to truck traffic immediately, noting that the advisory was for vehicular traffic, not just trucks.  The state would need to put up signage in their right-of-way alerting drivers about the closure, which will take time.  Marconi says cars could use the Portland Avenue bridge, but larger trucks looking to access business across the railroad tracks, can't negotiate that turn.  Selectmen Steve Zemo suggested cutting through the train station via the Portland Avenue bridge, and using the Depot Road rail crossing to get to West Branchville Road.