Transparent technology. As you’re probably aware, ... Some traffic light controllers upload that data to UDOT’s servers in real time; in others, they upload it every 10 or 15 minutes.

Traffic lights might see a fourth signal as self-driving cars become more practical. Getty Images/iStockphoto. The researcher’s latest plans differ from a 2020 model of a four-light intersection.

The team first introduced the idea of a fourth light in 2020, but realized a centralized system with a traffic light receiving AV signals and calculating the best route caused processing delays.

Urban planners in Vienna, Austria, installed their first smart traffic lights specifically designed to increase pedestrian safety in 2018. After years of analysis and improvement, the Graz ...

These simulators are showing researchers that traffic improves with the presence of AVs and a fourth traffic light and that fuel consumption is much lower as there is much less stop-and-go movement.