"<a href=""http://theoatmeal.com/blog/google_self_driving_car"">http://theoatmeal.com/blog/google_self_driving_car</a> Google's newest versions of driverless cars do not have a backup driving system. And they do not have a steering wheel. They also operate on public roads (max 25mph) with other cars", motorcycles and bicyclists. Without fluorescent signs.