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The slow but steady advance of driverless vehicles

Robo-taxi services and driverless trucks are gaining ground but progress is painstaking.

Mr Johns recorded the experience, a video that went viral almost immediately and was picked up on TV stations around the world, casting fresh public doubt about self-driving cars and how ready they are for real-world passengers. "Three things - people, money and process," says Sven Beiker, a lecturer at Stanford Graduate School of Business, and managing director of Silicon Valley Mobility, an automotive consultancy. "There's definitely more competition... there are four or five companies that are very similar to Waymo," says Mr Beiker who is currently working on a study of robo-taxi deployments around the world, sponsored by Sweden's innovation agency Vinnova.

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