[NCSU] Researchers Proposed the Fourth Signal of Self-Driving Vehicles’ Traffic Signals
[NCSU] Researchers Proposed the Fourth Signal of Self-Driving Vehicles’ Traffic Signals
When a vehicle approaching an intersection is controlled by a driver rather than an AV, the signal reverts to the traditional green-yellow-red signal pattern.”Giving AV part of traffic flow control is a relatively new idea called the mobile control paradigm,” says Hajbaie. “It can be used to tune traffic in all AV-related scenarios. However, we believe it is important to introduce the concept of white signals at intersections. Because it tells human drivers what’s going on. It’s because they know what to do when they approach the intersection. “And to be clear, the color of ‘white light’ is not important. What’s important is that there are signals that drivers can clearly identify.” The researchers first introduced the concept of “white phase” traffic intersections in 2020. However, while early concepts relied on a centralized computing approach, the computer controlling the signal receives input from every AV it accesses, makes the necessary calculations, and then tells AV how to proceed through an intersection. Hajbaie said, “We’ve improved this concept and in this paper we’re going to outline the white phase concept that relies on distributed computing. In other words, we use all AV computing resources effectively to determine the flow of traffic.” “This is more efficient and less likely to fall victim to communication failures. For example, even if communication with traffic lights is interrupted or time is delayed, the distributed computing approach can still handle traffic flow smoothly.”To test the performance of the distributed computing white pase concept, researchers used microtraffic simulators. These simulators are complex computational models designed to replicate actual traffic up to the operation of individual vehicles. Using these simulators, the researchers were able to compare traffic behavior at intersections with and without white phases and also how the number of AVs involved affected such behavior. Hajbaie said “simulations teach us a few things”. “First, AV improves traffic flow regardless of the presence of white pases. Second, in the presence of AV, the white phase further improves traffic flow. This also reduces fuel consumption due to low stop and movement traffic. Third, the higher the traffic ratio at white-phase intersections consisting of AVs, the faster traffic movement through intersections and improved fuel consumption figures
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References
Researchers Suggest Fourth Light for Traffic Signals – The new lights for self-driving cars can control the flow of traffic and let human drivers know what’s going on. on.news.ncsu.edu
Researchers Suggest Fourth Light for Traffic Signals – The new lights for self-driving cars can control the flow of traffic and let human drivers know what’s going on. on.news.ncsu.edu
Researchers Suggest Fourth Light for Traffic Signals – The new lights for self-driving cars can control the flow of traffic and let human drivers know what’s going on. on.news.ncsu.edu
