Which innovative transportation product design feature was first introduced by Volvo in 1959 and is now standard safety equipment in vehicles worldwide?

The transportation industry has seen remarkable product innovations aimed at improving efficiency, sustainability, and passenger experience. From high-speed trains to electric vehicles, transportation products have evolved dramatically in recent decades. This trivia question focuses on a groundbreaking product design innovation that changed public transportation systems worldwide. Test your knowledge of transportation product history!

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Three-point safety belt
Regenerative braking system
Heads-up display (HUD)
Automatic emergency braking