Next time you hail an Uber in Pittsburgh, you might end up riding in a machine-run vehicle! In August, NPR reported on Ubers plan to run an experiment in Pittsburgh, where it will test the first-ever self-driving fleet thats available to everyday customers. For safety purposes, an Uber staff member (an engineer or specially trained driver) will be inside, acting as a human "co-pilot." So technically, its not a car without a human. In fact, for the time being, a human co-pilot is a neces...