, a sport in which drivers race specially designed cars over tracks or courses of different length, designs, and construction. It tests the skills of the drivers, the speed capabilities of the vehicles, and the endurance of both. , which originally consisted of occasional challenges among wealthy individuals in the United States and continental Europe, has evolved into an international year-round professional sport. It is one of the most popular spectator sports in the world with races run before millions of fans at events with wide coverage ....