"Adaptive Traffic Control Systems in the United States"

HDR Engineering, Inc., 2009
By Matt Selinger, P.E., PTOE and Luke Schmidt

Adaptive traffic control technology holds great promise for reducing congestion on U.S. arterial roadways; however, there are only a handful of adaptive systems in operation in the U.S. Why is this? And why does the U.S. lag behind many other countries in the use of adaptive technologies? A survey of agencies that have implemented adaptive traffic control systems was conducted in an effort to gain a greater understanding of why use of adaptive technology is limited in the U.S.