In the US it is very difficult, due to low density, road design, and use patterns, to make transit service, especially bus lines, both economical and pleasant t

In the US it is very difficult, due to low density, road design, and use patterns, to make transit service, especially bus lines, both economical and pleasant to use at rush hour. AVs can enable surge capacity for bus service, and a mix of vehicle sizes. It can enable smooth transfers, more lines with more stops, and higher frequency of service in a lot of places that have really bad mass transit. Guangzhou already has a few autonomous bus lines. Compared to the cost of a bus, a conservative approach to an AV sensor suite is cheap.