ATDynamics, Inc., introduced the aerodynamic TrailerTail®, a rear drag-reduction device that the company claims can increase the fuel efficiency of long-haul tractor-trailers by more than five percent. TrailerTail® is constructed of lightweight, rugged plastic panels designed to endure daily wear and drive sbuse, yet ensure smooth opening and closing. A patented TrailerTail® hinge system allows drivers to operate doors and access loading bays normally. The TrailerTail® collapses from four feet to three inches in length in less than eight seconds.