Buses are a relatively decent solution for a city lacking in public transportation infrastructure. For example, Phoenix (where I live) has a network of north-south and east-west buses that can get you, eventually, to anywhere in the valley (Uber/Lyft can fill in the gaps). I normally drive, like 4 million others, but several times I've taken the light rail from Sky Harbor to midtown, then a couple of buses to my destination many miles north of the airport, and I was impressed by how easy it is--and how underutilized.

Perhaps we can mitigate many of our urban problems--pollution & greenhouse gases, road congestion & traffic accidents, and consumer debt--by investing in electric or NG buses.