Googling "Texas Parade Car" I came up with the following. I should say first that I imagined it had to come from Texas..........
A vehicle made up from two Mercedes wagons, it is 79' long and weighs 7,500 lbs.
It has 3 axles and 8 wheels, one source says 4 wheel steering and parts from over 40 cars and other odd bits from here and there.
The builder is Antti Rahko, who emigrated to Florida (Not Texas in spite of his cowboy like attire) from Finland some years ago. It has been entered in a number of Parade Competitions and has won every time.
Edit: I should mention that it is apparently called "The Finn Jet".
Bill