I'm not happy about self-driving cars but I'm willing to give these bots a try. Here in NYC, we have little micro-trucks for Amazon deliveries. They are pedal-assist, legally, which is to say that when the driver pedals, it switches the motor on. The pedaling requirement is a legal one so it can be classified as a bicycle. They are very narrow and are less subject to congestion. They also cause less congestion than full size trucks. I'm in favor, given that deliveries are numerous. So if we have to have all these deliveries, I prefer them in the smallest possible vehicles.