nope, the day is broken up into 4 heats, you run once per heat, and work on heat, therefore you will be working and running the same heat once. during your corner work, you can leave anytime during the heat to run your car for that heat, and then return until the current heat is over. they have 4 classes that have subcatagories, novice, stock, prep'd, and race, Street Mod will be in Race, and i'll be in prep'd. they use a hand held air horn to signal heats, and use the microphone to signal different classes. they have awesome bathrooms, and good food with plenty of gatorade for sale. i don't bring my cooler and water when i go to martin cause they have the medium gatorades for $1.75 each.