The Evolution of the Traffic Light: Exploring the Need for a New Color | Science and Technology News

The iconic traffic light, a fixture on roads around the world, has remained relatively unchanged for almost a century. However, with the advent of driverless cars, experts are now calling for a redesign to ensure these autonomous vehicles can interact effectively with traffic signals.

Ali Hajbabaie, an engineering professor at North Carolina State University, is leading the charge to create a new traffic system that takes into account the unique needs of driverless cars. One proposed addition is a fourth light, possibly white, to provide specific instructions to self-driving vehicles.

Traffic lights play a crucial role in not just ensuring safety on the roads but also in improving traffic flow and reducing congestion. According to the 2022 Global Traffic Scorecard by INRIX, road congestion costs the economy billions of dollars, making efficient traffic management essential.

The history of traffic lights dates back to 1868 when the first traffic light was installed in London. Over the years, the design and functionality of traffic lights have evolved, with the introduction of the three-colour system in Detroit in 1921 and the invention of electric traffic lights in 1923 by Garrett Morgan.

As technology advances, new innovations like AI are being explored to enhance traffic systems. Civil engineering professor Henry Liu is leading a project to use real-time data from GPS-equipped cars to optimize traffic light signals in Detroit. This innovative approach could revolutionize how traffic lights operate and improve overall traffic management.

With the future of transportation moving towards autonomous vehicles, the redesign of traffic lights to accommodate these new technologies is crucial for ensuring safe and efficient roadways. The evolution of traffic light systems continues to be a fascinating intersection of history, technology, and innovation.