[meemooer]

I was just at the Mid-American Truck Show[MATS] last weekend, and running a "super single" as they are called does improve rolling resistance, and does help with weight. Most truckers from the show said they would rather run those after driving on a set, but the cost is too much for most to make the switch. There was a few vendors with full side skirts the the trailers. They had hinges on them so they are less likely to break off, instead they fold under the trailer. A few manufacturers had new rigs set out for aerodynamics to increase gas mileage. Using lighter materials to build the cabs, and a few design changes in the front end to help with CD.