By 1957, 77 percent (131 out of 169) of town governments had established some type of planning and/or zoning agency, according to the Connecticut Development Commission, and most of these were located in the rapidly-suburbanizing regions around Hartford, New Haven, and Bridgeport. Map developed by Jack Dougherty and Ilya Ilyankou. View historical sources and code on GitHub. Learn more at OnTheLine.trincoll.edu.