Interstate 55 in Sainte Genevieve County

Mileage sign in Ste. Genevieve County, Mo.
Photo courtesy of Michael Summa

It's not quite "do-do", but if you mixed up the letters, that's what you might get from this mileage sign along Interstate 55 in Ste. Genevieve County, photographed in 1975, clearly showing the button reflectors used for almost all Missouri freeway signs at the time.