Assistant Professor Gabor Orosz was quoted in a BBC article titled “Can a city ever be traffic jam-free?”
“Humans react to the motions of the vehicles immediately in front with a reaction time delay. The impact of this is that they often amplify the ripples created by other drivers tapping the brake. As the congestion wave cascades along the chain of vehicles, eventually it grinds traffic to a halt,” said Orosz.
Read the full story here: http://www.bbc.com/future/story/20140611-can-we-ever-end-traffic-jams