The Museum of Hoaxes is dedicated to promoting knowledge about hoaxes. (Click here for opening hours, etc.) On our blog we post about whatever dubious-sounding claims come across our path on a day-by-day basis. In our archives we have hundreds of articles about the most fascinating and notorious deceptions throughout history, from the middle ages to the present.
Status: Mixed: first is false; second is possibly true.
Here's a couple of YouTube videos on the subject of controlling traffic lights. The first video is for pedestrians. It claims that by clicking the walk button in a special way you can cause the traffic light to change in your favor. This secret code is: 3 short clicks, 2 long, 1 short, 2 long, and 3 short. Sounds like total baloney to me. Of course, if you live in New York City, many of the walk buttons have no effect whatsoever on the signal because they were disconnected decades ago.
This second video claims that it's possible to cause red lights to turn green by using a universal remote control. I'm more inclined to believe this is possible, since I know that emergency vehicles do have devices to change the lights to green. However, you would first have to locate the correct frequency, which would mean standing there with the remote on scan mode until it hits on the right one. Also, you'd need to know the correct code. (The video claims the code is 911.) Finally, would a typical remote control have a strong enough signal? Oh, and it would also be completely illegal.