Which automotive design innovation, first introduced in 1959, revolutionized vehicle safety and aesthetics by eliminating the need for a full perimeter frame?

The automotive industry has seen countless innovations over the decades, but some product design breakthroughs fundamentally changed how vehicles are manufactured and experienced. This poll tests your knowledge about a pivotal design innovation that transformed passenger safety and vehicle aesthetics simultaneously. Think you know your automotive design history? Put your knowledge to the test!

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Unibody construction (monocoque chassis)
MacPherson strut suspension
Crumple zone technology
Pillarless hardtop design