I think this article sums up pretty well why cities are not in the best position to plan for an entire region and why decisions by individual cities don’t necessarily add up to optimal results for the region or state as a whole: https://www.washingtonpost.com/news/wonk/wp/2016/08/10/why-cities-need-to-care-more-about-works-in-them-not-just-who-lives-in-them/