Connecting Philadelphia, Pa. and Camden. N. J. The Delaware River Bridge is one of the World's largest single span suspension bridges. Its total length is 1.81 miles. The main span between the towers is 1.750 feet and is 135 feet above mean high water. The towers are 385 feet high and the width over all is 125 ft. The Vehicular roadway is 57 feet wide, allowing six traffic lines with one high speed track on either side and one trolley track. There are two ten-foot footways over trolley tracks.