Which autonomous transportation technology was first successfully deployed for regular public transit service in a major city?

Autonomous vehicles are transforming public transportation systems worldwide. Cities are investing billions in smart transit solutions that promise to reduce congestion, lower emissions, and improve accessibility. This poll tests your knowledge of recent technological advancements in autonomous public transit and how they're being implemented in urban environments today. How well do you understand the cutting-edge developments shaping the future of how we move through our cities?

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Self-driving buses in Singapore (2016)
Autonomous subway trains in Paris (2018)
Driverless taxis in Tokyo (2017)
Autonomous ferry service in Stockholm (2019)