Here in Mesa, AZ the newest fad in unmarked cars are pickup trucks. No visible signs on the outside as far as I could tell. I think they were Ford F150s, a year or two old. One was brown and the other was white. The headlights and taillights 'waggle' and the red and blue lights are mounted to the sun visor, the officer flips the visors down and then turns the lights on. The officer has a special uniform, just a polo shirt, with no markings on it, except near the waist where he was wearing his badge, gun, cuffs, etc. He was also in blue jeans. Very scary indeed.