Waymo is going to start manually testing its vehicles in four new US cities: Baltimore, Philadelphia, Pittsburgh, and St. Louis. Waymo plans to start by deploying manually driven vehicles, then fully autonomous ones, followed by select passenger trips, and finally, a public robotaxi service. (The company is already is driving autonomously with a safety driver in Philly.) Waymo has signaled it hopes to launch in over 20 cities in the coming years. Of course, not every city is welcoming the robotaxis with open arms.