Which groundbreaking design feature did Japan's original 1964 Shinkansen bullet train introduce that revolutionized high-speed rail development worldwide?

High-speed rail has transformed transportation around the world, offering efficient alternatives to short-haul flights and car travel. But behind today's sleek bullet trains lies a fascinating history of innovation, competition, and design breakthroughs. Test your knowledge about the evolution of high-speed rail systems and discover how product design in transportation has shaped modern mobility solutions.

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Dedicated elevated tracks completely separated from conventional rail lines
The first use of maglev (magnetic levitation) technology for commercial passenger service
Double-decker passenger compartments to maximize capacity
Pressurized cabins similar to aircraft to reduce ear discomfort in tunnels