mystery solved?

A while ago, I wrote about a truckmonster I kept seeing driving around the inner parts of the city. It has bothered me since, not being able to figure out what was happening. Only now, after a few months of using Google maps with street view, did it occur to me that perhaps THAT is what was happening. Then I looked around online. Nope. Here’s an example of a car mapping for Google. The thing that I saw was a big white pickup, driven by HPD, with two large, white boxy devices on either side of the cab of the truck, pointed away from the vehicle. Toward what?

The mystery continues.