One person was injured, and traffic was snarled in north Hanover, after a semi-truck destroyed a traffic signal in one of Hanover's busiest intersections and left the intersection a four-way stop ...

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.

Traffic lights help traffic flow by directing specific lanes to go and others to stop. Some are more complex and include signals for buses. But at the end of the day, they're devices with red, yellow, ...