http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=2306.0 has a new remixed version of the same simulation
Ejs Open Source Reaction Time Measurement Traffic Light Model Java Applet by Fu-Kwun Hwang[img]http://2.bp.blogspot.com/-H5n50gHfmls/Toc7cdfCz9I/AAAAAAAAA_U/IViE5p2rXlA/s1600/Screen+shot+2011-10-01+at+PM+11.55.53.png[/img]
http://weelookang.blogspot.com/2011/10/ejs-open-source-reaction-time.html
remixed by lookang
reference:
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=387.0 Ejs version
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=137.0 JDK version

enjoy :)