OK,OK, I can't let this go any further, LOL, I appreciate the research comment Tango,
but I gotta fess up here. I have no earthly clue what those silver things are on the tractor trailers, I made it all up! Bwahahahaha, I'm sorry, I was trying to get Jack and Orion11 with my stupid joke,
but instead I got you and Judykott.
I was just being silly, but it sounded good didn't it?
You two have my permission to call me an a...shole, LOL, but I figured I should stop it before it gets too far, hehe SORRY!