It’s a new bridge with a long history. Originally constructed as a cantilever bridge and opened to traffic in 1955, the Tappan Zee Bridge is being replaced with a 3.1 mile twin span, cable-stayed bridge that crosses the Hudson River at its widest point. Although it serves as a vital crossing of the river for New York residents, it wasn’t originally constructed to last. The initial bridge was built in the wake of the Korean War. This resulted in a tight budget and a shortage of quality materials for building. It was meant to last fifty years (at best) and carry max 100,000 cars. But now, with roughly 140,000 cars crossing daily, it has far exceeded its limits and originally planned fifty-year lifespan.