CART measured for the inaugural race in 1996 a length of 1.517 miles (2.441 km).[3] This length was referenced to the old rectangular layout. In 1998 was the track length remeasured to 1.502 miles (2.417 km)[4] This length was also used for timing and scoring until the last CART race in 2000.[5] This length was referenced to the flat paperclip-layout. The NASCAR timing and scoring use a length of 1.50 miles (2.41 km).[6] This length was used by IRL between 2001 and 2003, too.[7] Since 2004 the IRL timing and scoring use a remeasured track length of 1.485 miles (2.390 km).[8] This length referenced to the new banked layout.