Which product design innovation in transportation has reduced the average vehicle's fuel consumption by approximately 25% over the past three decades?

Product design in transportation has evolved dramatically over decades, balancing aesthetics, functionality, safety, and environmental concerns. From aerodynamics to materials science, designers have revolutionized how we move. This trivia tests your knowledge about a pivotal design innovation that transformed modern transportation efficiency and sustainability. Can you identify the correct breakthrough from among these significant developments?

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Advanced aerodynamic profiling and wind tunnel optimization
Lightweight composite materials replacing traditional steel components
Computer-optimized direct fuel injection systems
Regenerative braking technology implementation