U.S. Interstate Highway System (1956-1992)
President Eisenhower launched America's largest infrastructure program, building 80,000 kilometers of highways over 35 years at a cost of $144 billion ($558 billion inflation-adjusted). Inspired by Germany's autobahn, the Interstate connected the nation, enabled suburban growth, and projected American power. The first half was completed in 14 years; the second half took 20 years as political will faded and costs escalated.
Transformed American mobility, commerce, and development patterns within a generation.
Created car-dependent culture, enabled economic expansion, but also hollowed urban cores and increased oil dependence.
China's infrastructure push mirrors America's Interstate era—but compressed into 15 years instead of 35, and running parallel with high-speed rail and renewable energy. The U.S. did this once. Can it still?