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The Grand Prix of Indianapolis is a pair of twin races in the Cooper Tire Indy Lights Series, held on the road course at the Indianapolis Motor Speedway. It is held as a support race to the Grand Prix of Indianapolis of the Verizon IndyCar Series. The race was previously known as the Liberty Challenge from 2005–2007. It originally was held as a support race to the United States Grand Prix. ==Race History== For the first three years of its existence, the Indy Pro Series was contested on oval tracks only. This was also true of the parent IndyCar Series, at the time. All Indy Pro Series races were run as support to IndyCar Series events. Road course and street course events were added to both series in 2005. In that year, the series added the Liberty Challenge, as a support race to the Formula One United States Grand Prix at Indianapolis. This move allowed the Indy Pro Series drivers valuable exposure in front of the Formula One teams and fans. Some drivers, such as Graham Rahal, ran this race as a one-off, while running other series (such as the Champ Car Atlantics). The Liberty Challenge was the only Indy Pro race at the time which was not run as support to an IndyCar Series contest. Also, the Indy Pro Series became the only racing series to hold races on both the oval and road course tracks at the Indianapolis Motor Speedway. In 2007, a twin race format was utilized. After 2007, the U.S Grand Prix left Indianapolis, and the Liberty Challenge race was put on hiatus. In 2014, the race was revived as part of the new Grand Prix of Indianapolis weekend, where all four IndyCar-sanctioned divisions participate in races on the road course during the first weekend of the Indianapolis 500 race meeting. The races are set for Friday and Saturday mornings each day. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Grand Prix of Indianapolis (Indy Lights)」の詳細全文を読む スポンサード リンク
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