WeRide will begin trialling its Level 4 robotaxis in snowy night-time conditions.

"Beijing’s complex night-time road conditions, characterized by low lighting, environmental interference – heavy rain in the summer and snow in the winter – pose significant challenges for autonomous driving systems."

Although Level 4 self-driving means vehicles can drive along pre-mapped routes, these are suddenly much less "mapped" if covered in snow. Beijing doesn't get huge amounts of snow, typically 11 days a year, and it's not usually heavy. But that is more than any robo-taxi has had to deal with before, in places like Shanghai or San Francisco.

WeRide starts 24/7 robotaxi testing in Beijing