Which product design innovation, first widely implemented in the 1980s, revolutionized public bus accessibility for wheelchair users and is now standard in most urban transit systems?

Test your knowledge about a groundbreaking product design innovation that transformed public transportation accessibility and changed urban mobility patterns worldwide. This innovation represented a significant shift in how transportation products could be designed with universal access in mind, eventually influencing standards across the industry.

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Kneeling bus technology (buses that lower at stops)
Automated subway platform gap fillers
Self-extending bus canopies
Electronic ticketing systems with audio guidance