Explanatory note: Comparing US and EU truck fuel economy

In June 2015, the US Environmental Protection Agency announced phase II of fuel efficiency standards for medium and heavy-duty trucks, intended to reduce planet-warming carbon pollution. In the US tractor-trailers average between 33-36l/100km. The new proposal will bring that down to below 27l/100km by 2027. This explanatory note details how US trucks will overtake European lorries as the most efficient in the world.