Stoplights can be changed to green via an infrared signal.  This is so that police and ambulances can get through traffic faster.  Some people are using it to their own benefit.  So, the US government is trying to make these devices illegal if not authorized.  Hmm, sounds like cell phone companies when responding to the thread of eavesdroppers.  Why bother adding any security measures when we can just make it illegal?  I mean, no one ever breaks the law, right?

http://www.omaha.com/index.php?u_np=0&u_pg=1636&u_sid=958234