Railfanning Norfolk Southern RR

[FCIN]

Caught this tacked on the end of NS 215, a Northbound intermodal train in Danville, KY. Any one ever seen this before? Three axle 53 foot trailers, no less. And how about those trucks?         These things apparently are operated by Trailer Bridge Inc http://www.trailerbridge.com/ and carry TRBU reporting marks. Couldn't find out anything about them on their web site.