I travel between Plainfield, IN and Columbus, Ohio alot. I have a hard time understanding the speed laws around Indy. You are doing 70 East of Indy and then it is 55 around Indy. THe loop and most of the highways in Columbus are 65 except for a few areas. Indy and Columbus are similar cities so I don't understand the 55 limit. It is one of those strange times that Columbus is ahead of Indy in something.