Side skirts on semi-truck trailers are aerodynamic devices that help lower wind resistance beneath trailers. This resistance, known as aerodynamic drag, has a detrimental effect on fuel economy ...

You've probably noticed those giant flaps mounted on the backs of many semi-trailers you see on the highway. Here's what they ...

On flatbed semi-trailers, ... On aluminum flatbeds, usually the beam, side rails, and floors are all made from the lightweight metal. Steel flatbeds are known for their durability and long life.

For a while now, the Insurance Institute for Highway Safety has tested under-ride guards at the backs of semi-truck trailers to find which ones are effective at preventing grisly accidents. Now ...

CHICAGO (CBS) — A semi-trailer truck toppled over the side of the Dan Ryan expressway near Chinatown early Thursday morning. Authorities said the truck was traveling southbound at about 1:09 a.m ...

Side-underride guard have been mandatory in Europe for all trucks, trailers and semi-trailers since 1986. Performance standards there are lighter than what might be proposed in the U.S. Photo: Jim ...