A combination race is any sort of racing event where drivers from two racing circuits compete in the same event in similiar if not identical vehicles. These races are sanctioned under the banner of both series and in most cases count toward the championship in those respective series' seasons. On-track racing procedures during these races are nearly always similar to that of a race exclusively composed of drivers in one series, denoted as a stand-alone race. However, because of the complexities of creating an equal playing field and the importance of championship standings, allotment of points, purse, and awards are treated differently in combination races than in stand-alone races.