tl;dr lawyers/actors are in charge of projects for which they have no domain expertise. just using their temporary appointment on a 'transportation committee' as a stepping stone to some other job in public office.

the actual planning and execution are either completely neglected over politicized that its almost impossible to build something efficiently. not to mention building such projects in large cities is extremely complicated and requires tons of focus and experience. doing it the way our government structures projects is almost impossible.