I occasionally have to use Uber and I think the drivers should be given some kind of magnetic sign that shows they are an Uber driver. If you're waiting at a busy location, for example Walmart of a hotel there is no way to know for sure which car is for you. They give you the color of the vehicle and drivers name. Outside of Walmart is crazy as people, illegally, will part in from of the store to drop off or pick up a person who is too lazy to walk to a parking spot. Or maybe have a Uber Only parking space out front.