London could prove the company’s biggest challenge yet. Unlike more car-oriented cities in the US, London’s streets are more winding and narrow, the city's layout a legacy of its pre-Roman and medieval history. “We will take the same rigorous approach to testing and deploying in London as we have in other cities before offering rides to the public,” Waymo spokesperson Ethan Teicher wrote in an email. He says Waymo’s experience in Tokyo will help its software drive in London.