Increasing Market Penetration of LED Traffic Signals in New York State:   Review of Articles and Information on LED Traffic Signals
  A primary purpose of this review is to identify and summarize recently published information about the use and performance of light-emitting diode (LED) traffic signals. It consists of two sections: a synopsis of experiences of municipalities using LED traffic signals in 1999 and 2000, and a discussion of technical, economic and market issues surrounding the deployment of LED signals. This review includes articles and reports published in 1999 and 2000. 
John D. Bullough, Margaret Suozzo