You need to Bug out quickly with a vehicle and everyone has the same idea and your stuck behind traffic lights, which can seriously delay your bugout time (increased time means smaller bugout radius before TSHTF). A MIRT (Mobile InfraRed Transmitter) can be used to turn the lights from red to green.
A very low cost IR emitter can be purchased such as the one here;
http://www.dealextreme.com/details.dx/sku.12625It would seem that a homebrew modification can be made reasonably easy to modulate the IR beam to act as a MIRT and be disguised as a simple flashlight i.e. swapped out with another dropin into a flashlight like a Surefire 6P.
BTW (apparently it is highly illegal to use such a device, but the consequences of not bugging out in time may well be many times worse than getting caught using such a device)
Any thoughts!