Self-driving cars will someday be the norm on American roads. But until that happens, there are going to be a lot of awkward run-ins with people who don't quite understand the concept of a car that drives itself.
Case in point: this photo, captured by Zandr Milewski and posted to Facebook this afternoon, that shows what appears to be one of Google's self-driving cars getting pulled over by a police officer.
In a comment on his post, Milewski said that he had "talked to the driver" of the self-driving car. (Presumably, he meant the human sitting in the front seat.) He said that "apparently MVPD [Mountain View Police Department] doesn't get NEVs [Neighborhood Electric Vehicles, a classification of vehicle that is limited to slower-moving roads] and pulled them over to ask why they were all going so slow."