From 1982 to 1989, the race was held on a 2.48-mile layout. In 1990, the track configuration was abruptly changed. After practice, several cars were experiencing problems in a bumpy section in turns one and two. Prior to the start of the race, the track was slightly reconfigured, eliminating the left-right combination of turns one and two. The main straight was extended towards the location of what was turn three, which then became turn one. The new layout measured 2.369 miles, and the segment eliminated became instead an extended exit to the pit road. The new layout was then adopted permanently. In 1997 the track length was remeasured to 2.106 miles without visible changes on the layout. The current layout is known for its turn 1 "vortex" at the start of races - after the green flag dropped, drivers would fan out on the wide concrete to gain position and then arrive at the corner sometimes five or six cars abreast, and all at once be "sucked" into the apex of the corner, frequently resulting in multi-car crashes at or just past the corner and leading to cars retiring before completing a single lap of the race.