Driverless cars are growing in number, but makers don't want to reveal how they sometimes fail

"The lack of transparency about the workings of sensors, logic processors, mapping systems and other driverless technology, like the debate over robot-car regulation, could shape public perception of the nascent industry, said Bryant Walker Smith, a law professor at the University of South Carolina.

"Essentially, [the public will be] looking to see whether these companies are trustworthy," he said"