Less than a year ago, self-driving technology company Aptiv launched a fleet of 30 autonomous vehicles in Las Vegas on the Lyft network. Its riders and complex mix of pedestrians and cars on the streets of Las Vegas taught them a thing or two. Here's how Aptiv, which has a total of 75 self-driving test vehicles and a 130,000-square-foot operations center in the city, took rider feedback to make their autonomous vehicle tech more approachable to human riders.