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Modern Marvels - Superhighways
Seizoen: 14 - Aflevering: 4 / 543 - Eerst uitgezonden: 28 februari 2008 - Episode ID: 182579
Millions of drivers travel the world's superhighways each year. See a multi-billion dollar expansion project in Houston where a stretch of superhighway is being widened to 20 lanes & Take a ride atop the High-Five, a 12-story, five-level interchange that's become the latest Dallas tourist attraction. Then it's off to China's 28,000-mile National Trunk Highway System.