B ecause of their ability to carry massive loads across immense distances, semi-truck trailers are considered a very important element in the logistics and supply chain industry. Carrying ...

There are several types of semi-trailers on the road that all serve a different purpose. Here are the main types and how they connect to the trucks.

Semi trucks keep the country running. ... Getty Images. To a lot of people, tractor trailer trucks, or semis, are speeding behemoths that you don't want to be driving next to.

Carrying everything from toys, food, medicine, appliances, ... Side skirts on semi-truck trailers are aerodynamic devices that help lower wind resistance beneath trailers.