This may be of interest to all of you out there that are interested in fuel economy. DieselMisers is a company that sells and installs scientifically-proven fuel-efficiency mods for heavy trucks - specifically aerodynamic mods like trailer skirts and boat tails, anti-idling mods like battery-powered air conditioners, and automatic tire inflation systems. It's worth checking out at
Truck Fairings and Trailer Skirts - Diesel Misers