Comment Re:Best way to conserve energy: (Score 1) 322
a fully loaded semi trailer carries 80,000 lb of cargo
Not true.
A fully loaded 18-wheeler has a Gross Vehicle Weight of 80,000 lbs. The vehicle itself weighs at least 32,000 lbs. (for a highway tractor with sleeper, and a standard dry van trailer). Most weigh lots more.
Assume 45,000 lbs. or less of cargo in a fully-loaded 18-wheeler.