Tappan Zee Bridge Support (spline). The Tappan Zee Bridge crosses the Hudson River near New York City. This bridge is in three parts so you need the whole pack to complete the bridge. Each section can be a stand alone bridge and the supports can be used with any bridge. The approch sections are very curvable and will fit anywhere you need a 4 lane bridge. Be sure the section just before the main bridge is straight and level with the main bridge so the road and edges won't distort. Jack