BostonRoads.com: Descriptive histories.Bridge Tolls Now!: Covers the movement to toll the East River bridges in New York City.Bridges and Tunnels of Allegheny County and Pittsburgh, PA: A comprehensive listing of the structures. Includes detailed histories and photographs.Dingmans Bridge: Official website of one of the few privately owned bridges left in America. History, photos, tolls, and directions.Metropolitan Transportation Authority: Manages transit, buses, subways, trains, bridges and tunnels in New York City and surrounding areas including Long Island.Nycroads.com: Extensively covers crossings.Phillyroads.com: History and current information on the infrastructure in the Philadelphia metropolitan area.The Port Authority of New York & New Jersey: Manages bridges, tunnels, airports and transit in New York City and Northern New Jersey.WWB Project Website: The official site for the Woodrow Wilson Bridge replacement project on the Capital Beltway on the south edge of Washington, D.C.