For 250 years, Johnston County was farmland. Then Interstate 40 arrived, and Raleigh suddenly felt like a neighbor. This is the story of how one county went from tobacco rows to rooftops — and how a single date, October 1st, 1991, set everything in motion. From the first zoning ordinance to the Unified Development Plan being written right now, Johnston County has been racing to manage a growth it never quite asked for. The fields are still out there. But you have to look harder to find them.