During a two-hour hearing in the US Senate Wednesday, top executives from Waymo and Tesla urged lawmakers to take action on long-stalled legislation to speed the deployment of self-driving cars on public roads. But after two hours of Q&A around a number of hot-button topics, including robotaxi safety, legal liability, remote operation, and China, it was clear that lawmakers were no closer to passing any bill related to autonomous vehicles. Waymo faced questions about its decision to use a