Which transportation company was first to launch a fully driverless commercial ride-hailing service available to the public without safety drivers in the vehicle?

The transportation industry has been revolutionized by autonomous vehicle technology over the past decade. Major tech companies and traditional automakers have raced to develop self-driving capabilities, but the journey began earlier than many realize. Test your knowledge about which transportation company first deployed a commercial autonomous ride-hailing service available to the public without safety drivers behind the wheel.

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Waymo (Google's self-driving car project)
Tesla with its Full Self-Driving beta program
Uber's Advanced Technologies Group
GM's Cruise autonomous vehicle service