Government must plan and maintain road, rail and other modes of transportation to assure efficient transit of people from one place to another. Reasonable zoning laws and enforcement must control undue density of building size and location, so as not to strain the transportation system. Costs and interference with local communities must be kept to a minimum, which means that all such decision-making must be done in close cooperation with those communities directly affected by any changes, to assure the well-being of all.