Is the objective to achieve the highest mph, regardless of who crossed the finish line first?
Yes. I copied and pasted this about competitive roll racing on a track...
"Cars will be paired in the staging lanes by the track staff at the head of the track. When signaled the cars will take off and the two cars will have 350 feet to pace one another at a start speed between 40-50MPH. Once the two cars reach the designated “start line,” a traffic light will change from Red to Green. As always, Green means GO!
The car with the higher qualifying speed gets lane choice, and the car in the right lane must pace the car in the left lane for ALL starts. Competitors will have a maximum of three attempts at a clean start. If clean start cannot be achieved in three attempts track officials reserve the right to DQ both racers. It's possible both drivers could be DQ'd for foul play/false starts. Do not play games!
The finish line will be marked with checkered flags on each side of the track. The first to the finish line will get the win light and move on to the next round.
There will be a breakout speed set for each class to be determined after qualifying. This is to help deter sandbagging."