Some forms of karting (and many other forms of racing) take place on oval tracks These may be dirt ovals or asphalt ovals An oval may be either banked or flat See speedway
a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it; "the sums of the distances from the foci to any point on an ellipse is constant"
Having the figure of an egg; oblong and curvilinear, with one end broader than the other, or with both ends of about the same breadth; in popular usage, elliptical