Based on the test using the same car (2010 Chevy Malibu) to hit every trailer I can only assume this is a test of the various trailers. The one thing I took out of this is don't ever rear end a semi trailer. It is pretty horrific watching the dummies head get smashed by the trailer deck.

To make this post complete I clearly have to post some Crash Test Dummies in honor of all the dummies that have been sacrificed to make things safer for us.