CART simply omitted the chicane before the pits on the downtown circuit for 1989-1991. Beginning in 2007, there has been an extra curb on the inside to tighten up the right-hander at the end of the back stretch. With the return of the long course last year, a similar curb was added to the inside of Turn 3, making it more acute on the inside than it was in 1998-2001.
As for the start, they might consider Turn 1 to be too close to the start/finish line. Then again, if they did do a standing start, the front few to several rows might be able to go through Turns 1 and 2 flat-out, which could actually alleviate the accordion effect through there.
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