Cars without drivers scoot around Nissan plant, towing cars

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  • Nissan Motor Co.'s Leaf,  with no one inside, scoots during a demonstration of their Intelligent Vehicle Towing system at Nissan Oppama plant in Yokohama, near Tokyo Monday, Dec. 5, 2016. Nissan Motor Co. is testing out self-driving cars at one of its plants in Japan to tow vehicles on a trailer to the wharf for loading without anyone behind the steering wheel.(AP Photo/Koji Sasahara)

    Nissan Motor Co.'s Leaf, with no one inside, scoots during a demonstration of their Intelligent Vehicle Towing system at Nissan Oppama plant in Yokohama, near Tokyo Monday, Dec. 5, 2016. Nissan Motor Co. is testing out self-driving cars at one of ... its plants in Japan to tow vehicles on a trailer to the wharf for loading without anyone behind the steering wheel.(AP Photo/Koji Sasahara) (The Associated Press)

  • Nissan Motor Co.'s "Leaf" runs with no one inside during a demonstration of the automaker's Intelligent Vehicle Towing system at Nissan Oppama plant in Yokohama, near Tokyo Monday, Dec. 5, 2016. Nissan Motor Co. is testing out self-driving cars at one of its plants in Japan to tow vehicles on a trailer to the wharf for loading without anyone behind the steering wheel.(AP Photo/Koji Sasahara)

    Nissan Motor Co.'s "Leaf" runs with no one inside during a demonstration of the automaker's Intelligent Vehicle Towing system at Nissan Oppama plant in Yokohama, near Tokyo Monday, Dec. 5, 2016. Nissan Motor Co. is testing out self-driving cars at ... one of its plants in Japan to tow vehicles on a trailer to the wharf for loading without anyone behind the steering wheel.(AP Photo/Koji Sasahara) (The Associated Press)

  • Nissan Motor Co.'S "Leaf", with no one inside,  pulls a trailer with three other Leafs on it, during a demonstration of the automaker's Intelligent Vehicle Towing system at Nissan Oppama plant in Yokohama, near Tokyo Monday, Dec. 5, 2016. Nissan Motor Co. is testing out self-driving cars at one of its plants in Japan to tow vehicles on a trailer to the wharf for loading without anyone behind the steering wheel. (AP Photo/Koji Sasahara)

    Nissan Motor Co.'S "Leaf", with no one inside, pulls a trailer with three other Leafs on it, during a demonstration of the automaker's Intelligent Vehicle Towing system at Nissan Oppama plant in Yokohama, near Tokyo Monday, Dec. 5, 2016. Nissan ... Motor Co. is testing out self-driving cars at one of its plants in Japan to tow vehicles on a trailer to the wharf for loading without anyone behind the steering wheel. (AP Photo/Koji Sasahara) (The Associated Press)

Nissan Motor Co. is testing out self-driving cars at one of its plants in Japan to tow vehicles on a trailer to the wharf for loading without anyone behind the steering wheel.

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The Japanese automaker thinks the technology will, in the long run, save costs and boost efficiency. The tests also can add to knowledge needed to take such autonomous driving onto public roads.

Nissan executive Haruhiko Yoshimura said the automaker hoped to use the technology throughout the Oppama plant by 2019, and in overseas plants in the future.

During a demonstration Monday, a Leaf with no one inside scooted along the road, pulling a trailer with three other Leafs on it, stopped properly for other vehicles, and then veered into a parking lot.