Walmart has introduced a new efficient tractor trailer that can save fuel and increase payload. The truck is powered by an electric motor driven and charged by a gas trubine. The newly proposed technology is called WAVE which stands for Walmart Advanced Vehicle Experience. The trailer is the first of its kind, made up of 53 foot carbon fiber side panels. The cab is designed for operator to sit in middle, to optimize the aerodynamics. The truck weighs about 4,000lbs less then a conventional truck,. There is not much data posted about the fuel efficiency, however its safe to assume that you could carry 4,000lbs more of payload with this concept.