Several automotive and tech groups are researching the technology, but a fully self-driving car could be far off
A LIDAR test vehicle of sensor maker Velodyne drives through a California street.
GPS and radio antennas on the roof of Stanford University's autonomous driving test vehicle.
An autonomous driving test vehicle sits in a garage workshop at Stanford University in California.
This Nissan test vehicle, on show at Ceatec 2012 in Japan, is able to park itself.
What the LIDAR sees. This image, taken from a LIDAR sensor mounted on the roof of a car, shows a downtown street in California. Other vehicles, buildings and objects are visible.
A Lexus car outfitted with autonomous driving sensors and systems, on show at CES 2013 in Las Vegas in January 2013.
Sergey Brin speaks during an autonomous vehicle event at Google headquarters in Mountain View in September 2012
Cars on the 101 freeway in Silicon Valley
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