Early traffic lights had only red and green, which unsurprisingly made intersections rather chaotic. Who invented the yellow ...

Research shows left turns at intersections are dangerous and slow traffic. Benjamin Rondel/The Image Bank via Getty Images Vikash Gayah: When you make a left turn, you have to cross oncoming traffic.

Traffic flow management at signalized intersections remains a cornerstone of urban transport research, combining traditional traffic theory with modern data analytics and optimisation techniques. This ...

Driverless cars are no longer things of the future. Engineers at NC State University propose adding a fourth traffic light to ...