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 ...

The right side of the semi truck also has a no-zone, and it's considerably larger than the others. It covers two to three lanes and has a length of almost the entire trailer.

Traffic near the east mixmaster was back to normal Thursday afternoon after a semi-truck was spotted on its side along an entrance ramp. In the video above, you can see what the area looked like ...

A tow truck operator lifted a semi-truck back up after it crashed off the roadway and flipped on its side. This happened along the I-57 exit in Marion.