Walmart wants shoppers to be able to hail a cart

http://baltimorecheckbook.tumblr.com/post/150346521872/walmart-wants-shoppers-to-be-able-to-hail-a-cart#_=_

Walmart is planning to eventually have self-driving shopping carts roaming its stores and herding themselves out of the parking lot.



from http://www.wbaltv.com/money/walmart-wants-shoppers-to-be-able-to-hail-a-cart/41631010