September 22, 1978: the day I-40 killed the town
The opening of the Interstate 40 bypass around Seligman in September 1978 is the most consequential date in the town's modern history. The new freeway, built progressively across northern Arizona through the late 1960s and 1970s, finally reached the Seligman segment and immediately diverted the through-traffic that had been the town's economic lifeblood for over half a century. The drop was severe and sudden — locals typically describe traffic falling by roughly 75 to 90 percent within weeks of the bypass opening.
The economic damage spread quickly. Within two years of the bypass, multiple Seligman restaurants closed permanently, several motels boarded their windows, and the gas-station economy that had supported much of the town's casual employment evaporated. Families who had lived in Seligman for two or three generations began leaving for Flagstaff, Kingman, or Phoenix. The remaining business owners — including the Delgadillo family, whose barbershop, drive-in, and gift shop had been Seligman institutions since the 1950s — faced the genuine prospect of the town disappearing within a decade.
What made the Seligman situation particularly stark was that the bypass had been preceded by years of warnings. Town leaders had lobbied federal and state transportation officials throughout the 1970s to route I-40 through Seligman rather than around it, recognizing exactly what would happen if the freeway diverted traffic. The lobbying failed; engineering and cost considerations favored the southern bypass route. The lesson Angel Delgadillo took from the experience — and applied to his later preservation work — was that small Route 66 towns had to advocate aggressively for themselves because no one else would do it.