Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Cyber-Physical Systems: A Framework for Dynamic Traffic Light Control at Road Intersections



Ossama M. Younis, Nader Moayeri


Traffic control at road intersections is based on traffic lights. The control mechanism typically used for traffic lights operates based on a periodic schedule to change the light (red/yellow/green). In many cases, a different schedule is used in late night/early morning hours. This fixed control mechanism does not adequately account for changing traffic conditions, and is unaware of/unresponsive to congestion. In this work, we propose a framework for dynamic traffic light control at intersections. The framework relies on a simple sensor network to collect traffic data and includes novel protocols for traffic flow control to handle congestion and facilitate flow. We show that our proposed algorithms have low overhead and are practical to employ in live traffic flow scenarios. Through extensive simulations, we demonstrate the benefits of our framework in optimizing traffic flow metrics, such as traffic throughput, average vehicle waiting time, and vehicle waiting line length.
Conference Dates
April 3-6, 2016
Conference Location
Doha, -1
Conference Title
IEEE Wireless Communications and Networking Conference (WCNC)


Traffic light control, traffic flow optimization, distributed algorithms, sensor networks
Created April 3, 2016, Updated August 12, 2019