The Massachusetts Bay Transportation Authority (MBTA) proposes to replace and modernize the existing North Station Draw One Bridge over the Charles River at North Station in Boston and Cambridge, MA. The project proposes to replace the current four-track, two-span movable draw bridge with a six-track, three-span draw bridge to improve commuter rail transit service.  The project includes improvements to bridge substructures, track alignments, signaling and communications systems, and passenger platforms at North Station to improve performance, safety, and reliability.  The project also proposes to remove and replace the original Draw One Bridge Control Tower A.