text: The article says that their cars have driven over than half a million miles without a crash, but what if they do? What if they dont alert the driver in time to take over and they crash? No one can be certain that they won't crash eventually. Another thing that the article said was that the Google car would use half the fuel of today's taxis, which is good, but what about the cars that aren't driverless? And aren't the taxis going to go up if we decide to make more driverless cars for everyone?