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Caroline is a 2006 Volkswagen Passat, converted by a team from the Braunschweig University of Technology to be an autonomous vehicle.
The car was a finalist in the legendary Darpa Grand Challenge, a US Defence Department-sponsored competition held every year or two in which driverless vehicles battle it out to see which can complete a set course in the fastest time. The cars must drive themselves — they cannot be steered by remote control.
Although Caroline came seventh out of the 11 finalists, it must be said that it did not successfully complete the course.
At the front of the car is an array of cameras, which are mainly there to locate lane markings. In the middle of the roof is a large GPS unit.