Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Charlestown Bridge is the easternmost bridge on the Charles River in Boston, Massachusetts. The bridge formerly carried the southernmost stretch of Massachusetts Route 99, which now ends at Chelsea Street in Charlestown. It connects to Joe Tecce Way to the south and to Rutherford Avenue to the north. The bridge is also part of Boston's Freedom Trail. It is also called the North Washington Street bridge.