1930s Equivalent of Car GPS Navigation (opens in new tab)

A folded map in the passenger seat is from the past and narrated driving directions by a computer is the present. In between came various gadgets designed to help drivers get to where they were going. Among them was Iter Auto, an Italian invention from the 1930s. It consists of a paper scroll identifying waymarkers along a popular driving route.Place the appropriate scroll in a machine which is hooked into the car's speedometer. It scrolled automatically to match the pace of the car.I found t...