Amazon-owned Zoox is advancing towards a full launch of its robotaxi service in San Francisco, inviting "Zoox Explorers" from its public waitlist to ride in its unique four-passenger vehicles.Tesla announced plans to expand its robotaxi service in Arizona after securing a permit from the Arizona Department of Transportation, aiming to remove human safety drivers in Austin by the end of the year.Chinese companies like Baidu are rapidly growing abroad, with CEO Robin Li noting robotaxis are nearing a tipping point in the US and China, while Waymo operates over 2,500 vehicles in the US and plans to launch in London next year.