Challenge accepted.
I've had to straighten some of the roads out, but they need to be widened anyway.
Looks nice, but that portion at the end of the bridge is the only way onto the island for anyone, so unless a car bridge could be made right there I wouldn't be expecting a call from IndyCar anytime soon haha.
In 2013, IndyCar will revert back to this layout, which was used from 1998-2001, I believe http://www.gmap-pedometer.com/?r=5525880
I would make an attempt, but I can't come up with anything legitimate that would be better really. Only idea I'd have would be to go counter clockwise as opposed to clockwise. You would need a lot of run-off at what is now the final corner so there's no risk of cars going in the river But it would offer 2-3 passing zones, compared to only one with the 2013 layout and none on the 2012 layout (original posted above)