This simulation is similar to the [url=http://www.phy.ntnu.edu.tw/ntnujava/viewtopic.php?t=226]traffic light contril[/url] I have created many years ago. But I rewrited it with ejs. You can click the +/- sign to change the time delay between traffic lights.

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Enjoy the fun of Physics! You can access this simulation online from
Ejs version of traffic control simulation
Designed by Fu-Kwun Hwang (http://www.phy.ntnu.edu.tw/ntnujava/)
Deptartment of Physics, National Taiwan Normal University, Taiwan