Public transit in the US takes decades because it already starts at a disadvantage vs European/Asian countries due to public perception. It takes decades becau

Public transit in the US takes decades because it already starts at a disadvantage vs European/Asian countries due to public perception. It takes decades because the procurement process is mired in red tape. "The best time to start something was yesterday, the 2nd best time is today" can be applied here. If something taking a long time is a deterrent, it will never get done(or take 20 years to get it done).