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More than any other technology, cars have transformed our culture. Cars have created vast wealth as well as novel dreams of freedom and mobility. They have transformed our sense of distance and made the world infinitely more available to our eyes and our imaginations. They have inspired cinema, music and literature; they have, by their need for roads, bridges, filling stations, huge factories and global supply chains, re-engineered the world.

A soaring bridge is an obvious infrastructural feat, but so are the mostly hidden reservoirs, transformers, sewers, cables, and pipes that deliver water, energy, and information to wherever we need it. When these systems work well, they hide in plain sight. Engineer and materials scientist Deb Chachra takes listeners on a fascinating tour of these essential utilities, revealing how they work, what it takes to keep them running, just how much we rely on them—but also whom they work well for, and who pays the costs.

On the morning of May 9, 1980, harbor pilot John Lerro was guiding a 600-foot freighter, the Summit Venture, into Tampa Bay. Directly in the ship's path was the Sunshine Skyway Bridge. Suddenly, a violent weather cell reduced visibility to zero at the precise moment when Lerro attempted to direct the 20,000-ton vessel underneath the bridge. Unable to stop or see where he was going, Lerro drove the ship into a support pier.

Freewaytopia: How Freeways Shaped Los Angeles explores how social, economic, political, and cultural demands created the web of freeways whose very form—futuristic, majestic, and progressive—perfectly exemplifies the City of Angels.

For millennia, humans have used one simple method to solve problems. Whether it's planting crops, building skyscrapers, developing photographs, or designing the first microchip, all creators follow the same steps to engineer progress. But this powerful method, the "engineering method", is an all but hidden process that few of us have heard of—let alone understand—but that influences every aspect of our lives.