The Indianapolis market gets to here all of the stats every year. This article includes the stats for several years of Carb Day arrests as well.

All in all, we're a pretty calm group considering the amount of alcohol consumed.

Speedway, Indiana becomes the 2nd largest city in the state on Race Day (Fort Wayne only has 255,000 people). If the population of Fort Wayne consumed that much alcohol in one day I'd bet there would be more than 178 arrests.

http://www.indystar.com/article/20130527/NEWS/305270033/Race-weekend-arrests-Indianapolis-Motor-Speedway-outnumber-last-year-charges-include-nudity-drugs-DUI