Complete the following sentence: The 1990 CART PPG Indy Car World Series season was the 12th national championship season of American open wheel racing sanctioned by CART. The 1990 CART PPG Indy Car World Series season was the 12th national championship season of American open wheel racing sanctioned by CART. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Al Unser Jr.<unk> was the national champion, and the rookie of the year was Eddie Cheever.<unk> <unk> <unk> <unk>
1990 Indianapolis 500 was sanctioned by USAC, but counted towards the CART points championship.<unk> 1990 Indianapolis 500 was sanctioned by USAC, but counted towards the CART points championship. Arie Luyendyk won the Indy 500, his first ever victory in championship-level competition, and the fastest 500 until the 2013 Indianapolis 500. Arie Luyendyk won the Indy 500, his first ever victory in championship-level competition, and the fastest 500 until the 2013 Indianapolis 500. Arie Luyendyk won the Indy 500, his first ever victory in championship-level competition, and the fastest 500 until the 2013 Indianapolis 500.