Wanderlust World Wanderlust World The Verrazzano-Narrows Bridge is a double-decked suspension bridge, not a truss bridge. It utilizes four massive main cables, each composed of thousands of individual steel wires, to support the roadway. Each main cable is 36 inches (91 cm) in diameter and contains 26,108 wires. The total length of wire used in the four cables is approximately 143,000 miles (230,000 km)—enough to circle the Earth nearly six times. The bridge's towers rise 693 feet (211 m) above the water, and the main span stretches 4,260 feet (1,298 m).