Google’s driverless cars run into problems with human drivers
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One Google car, in a test in 2009, couldn't get through a four-way stop because its sensors kept waiting for other (human) drivers to stop completely and let it go. The human drivers kept inching forward - paralyzing Google's robot. Humans and machines, it seems, are an imperfect mix. A 2012 insurance industry study that surprised researchers found that cars with lane departure warning systems experienced a slightly higher crash rate than cars without them. That highlights a clash between the way humans actually behave and how the cars wrongly interpret that behavior.
On a recent outing with New York Times journalists, the Google driverless car took two evasive maneuvers that simultaneously displayed how the car errs on the cautious side, but also how jarring that experience can be. In one maneuver, it swerved sharply in a residential neighborhood to avoid a car that was poorly parked. Then as it approached a red light the laser system sensed that a vehicle coming the other direction was approaching the red light at higher-than-safe speeds. The Google car immediately jerked to the right in case it had to avoid a collision. In the end, the oncoming car did stop well in time.