That's the likeliest explanation for why one of the internet giant's vehicles slammed into a low bridge outside Pittsburgh. It was in the process of driving around and taking pictures for the Street View feature on Google Maps and Google Earth; hence, the crash has been preserved on Google's servers.
Or maybe Google just didn't want to go to the trouble of deleting the wreck images. After an accident, the best approach is often to brush yourself off, pick up your camera and move on. Any spy worth his salt can tell you that.