We focus so much on personal vehicles and their environmental impact that we forget the impact created by other vehicles, like tractor-trailers. These heavy-duty trucks drive almost constantly and their fuel efficiency is pitiful.
That’s why the EPA is drafting new fuel-economy rules for medium and heavy-duty trucks that will take effect in 2019.
Before this happens though, some companies are taking initiative to improve the fuel-efficiency of their trucks. One such company is Walmart. Walmart has come up with the WAVE Concept Truck (or the Walmart Advanced Vehicle Experience Concept Truck), a tractor-trailer that is lighter and more aerodynamic than its counterparts. Since this vehicle would be 4,000 pounds lighter than a typical truck, it would be able to carry more cargo without ruining its fuel economy.
Watch this video to learn more about the design of the WAVE.
More info here.