We’ve all been there. Running late and seeing the cars in front of us slow down, or perhaps on the highway headed out on vacation and turning off the cruise control because the red brake lights of traffic are shining bright. We credit our misfortune to an 18-wheeler up ahead, who is keeping it just under the posted speed limit or is trying to make a sweeping right turn. This truck is big – which can be intimidating – but more to the point, it is slowing you down by a few seconds and keeping you from your destination. Taking a moment to roll down your window to say “Thank you,” to the driver probably isn’t the first thing on your mind, but perhaps it should be.