Will robot cars drive traffic congestion off a cliff?

Self-driving cars are expected to usher in a new era of mobility, safety and convenience, but they could also lead to more traffic jams. The problem is that too many people will use the technology when it becomes widely available, according to transport researchers. Experts foresee robot cars chauffeuring children to school, dance class and baseball practice. The disabled and elderly will have new mobility. Self-driving cars will give commuters a new freedom as they travel to the office, but they could also lead to more vehicles on the road, according to transport experts.