Which revolutionary product design feature was first introduced in Japan's original 1964 Shinkansen bullet train that fundamentally changed high-speed rail transportation?

High-speed rail has transformed transportation around the globe, but the journey to today's ultra-fast trains was filled with engineering challenges and innovative design solutions. Test your knowledge about one of the most significant product design breakthroughs in transportation history that continues to influence modern train development worldwide.

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Aerodynamic nose design that reduced sonic booms when entering tunnels
Magnetic levitation technology that eliminated wheel-to-rail contact
Pressurized passenger cabins similar to commercial aircraft
Automated self-driving capability for operations without engineers