Those blue lights above traffic signals aren’t decorative. Here’s what they’re for and why more cities are installing them. Blue confirmation lights help police spot and enforce red-light violations ...

In a tough year of budget cuts and management changes, Virginia's beleaguered Department of Transportation has found a bright spot. Workers are replacing thousands of green and red light bulbs in ...

Red and green traffic lights have been around since the 1800s, when British traffic officers used to rotate gas lamps that burned red and green to control the movement of mostly horse-drawn vehicles.

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 ...

Q: What are the rules about crosswalks at intersections with signal lights? Many people think that if they are in a crosswalk and the light is green for the automobile, they can still cross. Please ...