Buses are huge obstacles to the free flow of traffic (e.g. blocking right turns, slow left turns, blocking car and bike lanes with width) and are heavy polluter

Buses are huge obstacles to the free flow of traffic (e.g. blocking right turns, slow left turns, blocking car and bike lanes with width) and are heavy polluters (diesel powered, oversized for most of their operating time). This is all wrong. At any given moment, the average bus will replace at least a dozen cars, so a bus "blocking a right turn" for a few seconds is significantly less of an obstacle than a dozen or more cars in that lane. Buses make slow left turns, yes. But not much slower than normal cars, and it's far more likely that you'll miss a left turn due to a normal driver staring at Instagram on their phone instead of watching for the green turn signal. Buses do not take up more than their lane in the U.S. Also, buses and bus stops were around before bike lanes, which (being generous) serve 1/100,000th as many people. One diesel-powered bus still pollutes less than the vehicles it replaces. And finally, Chariot wasn't outlawed. It just couldn't compete on the basis of real-world economics even though it was charging a multiple of what Muni charged for the same routes. To put it bluntly: the private company so inefficient that it couldn't make the numbers work even charging 5x what the public agency was charging. (SF did suspend Chariot for a weekin 2017 because Chariot was found to have been employing drivers without licenses.)