The story of this episode takes place in a town called Redstone, but the road map on the wall of the police station shows Indianapolis, Indiana as the location of the town. Although the resolution of the map is not adequate to read any town names, several actual highway numbers, circa 1968, are clear.
The map with roadblock locations (shown lying on the hood of a 1967 Ford Custom police car) is of Kansas in the area of Great Bend, Russell, and Ellinwood.
Barry Morse most famously starred in Quinn Martin's prior hit show, The Fugitive (1963), as Lieutenant Gerard.
The map hanging on wall in police station in act 1 is of Indiana and of Indianapolis at red circle. Map year not known, but it shows yet to be completed I-70, I-65 and Northern portion of I-465 loop. It's identified by towns of Greenwood & Mooresville to the South, Danville & Plainfield to the West.
The map on the wall was also used in an episode of The Fugitive, which costarred Barry Morse and was also a Quinn Martin production.