This is where traffic-light countdown timers help. They are digital displays that show the number of seconds remaining before ...

Across the United States, drivers are looking up at intersections and noticing a new, unfamiliar glow: small blue lights perched near traditional red, yellow and green signals. They are not decorative ...

SANDY SPRINGS, Ga. — Atlanta traffic is messy enough on its own. But when problems hit, how agencies respond can look very different depending on where you are. In Douglas County, flashing red lights ...