Even so, the effort is raising concern from safety experts who say the technology has major limitations that can be very dangerous. Self-driving cars have trouble seeing in bad weather. Sudden downpours, snow and especially puddles make it difficult for autonomous vehicles to detect lines on pavement and thereby stay in one lane.
Walker Smith added that self-driving cars have sometimes confused bridges for other obstacles. “People need to understand both the potential and the limitations of these systems, and inviting them inside is part of that education,” he said.
The vehicles also have difficulty understanding human gestures — for example, a crosswalk guard in front of a local elementary school may not be understood, said Mary Cummings, director of Duke University’s Humans and Autonomy Lab, at a Senate hearing in March. She recommended that the vehicles not be allowed to operate near schools.
Then there’s a the human factor: Researchers have shown that people like to test and prank robots. Today, a GPS jammer, which some people keep in their trunks to block police from tracking them, will easily throw off a self-driving car’s ability to sense where it is, Cummings said.
Current self-driving cars often cannot see which lane they’re in, if it’s raining. They don’t understand what a bridge is versus other road-terrain. They don’t understand what a cross-walk guard is. And they are reliant on a notoriously brittle location technology.
What can go wrong with testing them in urban centres then, exactly?