Firetrucks

Did you know that a firetruck has a special device on it that allows it to change traffic signals? that is why you never see them on the highway with their sirens on, only cops and ambulances. yet, they are at every accident scene and everything. actually, that is because the government is using them to test a new teleportation system. which makes you wonder why they need the traffic signal device. oh, the insidious mysteries of the government's secert plots!