As long as transportation itself has existed, aerodynamic adjustments have been around. The drag reduction system has become a key part of an overall race plan, just as fuel and tires are. The number of cars jockeying for position with a legitimate chance to overtake has increased. This adds suspense and excitement to a race. Usually, that is the case, but since a race leader isn't permitted to use the rear wing, two drivers can end up playing "DRS chicken."