Smashing Around the Bend

From publisher blurb:

Many demolition derbies occur on a normal racetrack, though they are often modified in order to add muddy patches and crossovers. The rules for such tracks are much like any other race, with the first vehicle across the finish line being declared the winner. Of course, in a destruction derby, you can be the first across the line by bashing all of the other vehicles until no one else can move, thus making you the only one who can even cross the finish line. Take an old racetrack, add in a jealous rival and a bit of sabotage, and you have this week’s thrilling edition of Destruction Derby!