That quilted pattern spotted on the rear doors of some semi-truck trailers may look good, but it also has a larger purpose.

S o you were driving next to a semi truck and noticed something odd beneath its trailer: a big silver tank hanging underneath the trailer box. No, it isn't a keg the driver plans to tap at the ...

The kingpin locking mechanism on a semi-truck trailer is what allows thousands of big trucks to make shipments all across the U.S. Here's how it works.