Nashville is upgrading its traffic lights for the first time in 60 years. New smart signals are being installed to adapt to real-time traffic conditions. This initiative aims to reduce congestion as ...

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.

Some things are so ubiquitous that it's easy to forget they're designed for a reason. With more than 300,000 traffic lights set up across the United States, it's easy to take how they look for granted ...