Yul Kwon of PBS travels coast to coast to reveal how America’s transportation systems make the nation the most mobile place on earth. Woven together by 200,000 miles of railways, 5,000 airports and 4 million miles of roads, America’s car culture has shaped our cities and defined our lifestyles. However, as roadways become more congested, many predict people will eventually give up this car-centric lifestyle and embrace mass transit. Recently we announced the Metropolitan Transportation Authority’s selection of Gruen Associates and Grimshaw Architects to design the new master plan for Union Station in Los Angeles. Their winning proposal gives a hint of what America may look like by 2050, as it transforms into a more mass transit centered nation.