What in the world is this?

Spotted this parked on the shoulder right at the eastbound entrance ramp of Country Club onto the US-60. I actually went by it on the highway first, and had to turn around and come down the ramp to get pictures (with my lousy cell phone.)

Coming down the ramp onto the freeway. See the green Cavalier parked on the shoulder?

Get a little closer. Emergency flashers are on. See something odd on the trunk?

Same picture as above, just zoomed in with the brightness adjusted. There are two boxes mounted on the trunk, one facing off to each side. Cables run out the rear passenger door and to the mounted devices. I am fairly sure I saw someone sitting inside. No indication that this is any type of official vehicle. There is, however, a bumper sticker for the local Spanish radio station...


So what on earth is this thing? Some kind of undercover photo radar? Smog detector?