A total of 48 drivers representing 14 nations this afternoon completed a two-day Mazda Road to Indy Presented by Cooper Tires open test at Road America in rural Wisconsin. All three levels of the acclaimed open-wheel development ladder, which offers scholarships for drivers to progress all the way from the grassroots of the sport to the Verizon IndyCar Series and the Indianapolis 500, saw action on the scenic and challenging 4.014-mile natural terrain road course.