Municipalities, Type A Corporations, cost and impact of project or category of projects, public hearing preceding election [municipalities located in a county that has a population of 500,000 or less; or (2) has a population of less than 50,000 and: (A) is located in two or more counties, one of which has a population of 500,000 or more; (B) is located within the territorial limits of, but has not elected to become a part of, a metropolitan rapid transit authority: (i) the principal municipality of which has a population of less than 1.9 million; and (ii) that was created before January 1, 1980, under Chapter 141, Acts of the 63rd Legislature, Regular Session, 1973, and is operating under Chapter 451, Transportation Code; or (C) is located within the territorial limits of, but has not elected to become a part of, a regional transportation authority: (i) the principal municipality of which has a population of more than 750,000; and (ii) that was created under Chapter 683, Acts of the 66th Legislature, Regular Session, 1979, or Chapter 452, Transportation Code, and is operating under Chapter 452, Transportation Code.]