You may have noticed semi trucks with long pieces of metal hanging down toward the ground -- this is a side skirt, and here's ...

The iconic Mack bulldog has long found its home on a pedestal, but now, it's incorporated into the Pioneer's hood.

Semi trucks have a lot more space to cover with their mirrors, but it seems as if they have multiple ones very close by each ...

Their job isn't to deter Fast and Furious drivers from cutting beneath semi trailers. It's even more important ...