This will help (Score 1)

Actually, there was a study done that shows that for most traffic conditions, even heavy traffic, randomizing the lights allows greater throughput. Syncronized lights only help if the traffic is very light, or if it is very, very heavy. However, the very heavy case is also prone to unpredictable behavior, as you might imagine, so it's not that great. So, everyone using these things to change lights will randomize them, and help overall throughput.