traffic
Traffic scientists study ants because they manage traffic better than humans.
Warnings when traffic lights will change could make a difference.
A popular luxury car option might be part of the solution to unexplained traffic jams.
New model suggests mass-vehicle slowdown, triggered by decelerating vehicle, spawns traffic impasse.
Talking, browsing, texting -- even listening to music -- could lead to pedestrian accidents with motor vehicles.
Recent study finds that homicide rates predicted by a state's traffic fatalities.