"The point of different city transport agencies nationwide is to foster mobility. These MTAs run the local or regional transit service, and in some cases manage parking, taxis, roads, and other right-of-way issues. But many of them do a poor job. They manage transit services marred by misallocation and lack of innovation, helping explain why ridership has declined recently even as urban cores grow. But worse is that these MTAs, aiming to protect their fiefdoms, often stifle private competition that arises in response to these public failures. This double whammy perfectly describes the San...