Bristling with sensors and electronic eyes, robotaxis are appearing on London streets, slipping silently between red buses and black cabs, as companies battle to lead Europe’s emerging autonomous vehicle market.

British startup Wayve, in partnership with Uber, is racing to beat U.S. rival Waymo, owned by Google-parent Alphabet.

China’s Baidu also plans to launch in the British capital, where winding streets, roadworks and pedestrian traffic bring unique challenges.