Ever spot a strange window on the bottom of a semi-truck's passenger door? Here's more about why these trucks have this ...

For one thing, a semi truck's rear is usually obscured, so a dashboard rearview mirror wouldn't do anything. Regular side view mirrors, meanwhile, are too small to properly reflect the truck's ...

To help maximize fuel economy, semi-truck trailers try to improve the aerodynamics of the trucks, and one way to do this is to install side skirts. Side skirts on semi-truck trailers are ...