|Ohio State University began developing autonomous, or self-driving, vehicles in the 1960s. To stay on the road, early models such as this Plymouth followed a guide wire planted in the pavement. Sensors mounted to the cars front bumper sensed electrical current in the wire below. This photo depicts a test drive in the parking lot of Ohio States St. John Arena in Columbus. Photo courtesy of Ohio State University.|
|Sensors, like this one mounted to the bumper of a Plymouth, guided the path of early self-driving cars developed at Ohio State University. Photo courtesy of Ohio State University.|
|This car -- on a test drive on a Columbus, OH, country road in the 1970s -- carried a large electric generator on its roof to power the on-board computer and related equipment inside. Photo courtesy of Ohio State University.|
|In the early 1970s, computers were still large enough that fitting one inside a car was no easy task. Ohio State engineers had to remove half of the back seat of this car to make room for the computer. Photo courtesy of Ohio State University.|
|By the late 1970s, microelectronics technology had advanced to the point that much smaller equipment could control a self-driving car. Photo courtesy of Ohio State University.|
|As autonomous vehicle technology progressed, self-driving cars, such as this Chevrolet on a track at Ohio States Transportation Research Center, became indistinguishable from normal cars. Photo courtesy of Ohio State University.|
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