Apollo Go robot taxi cars in Wuhan have blocked the city after they all got bricked somehow. They’re due to appear on UK roads this year. https://www.bbc.co.uk/news/articles/cvge91r9j80o
Baidu's Apollo Go self-driving cars stop mid-traffic in China

Baidu has not responded to a request for comment about the outage, which affected at least 100 cars.

BBC News
@GossiTheDog - I was living in London oh so many years ago when the city experienced its very first gridlock. Nothing moved. For hours. Drivers grew so frustrated that they literally walked away from their cars where they stood and looked for subway / train alternatives.
And humans train robots.