Bettendorf, IA but anywhere in the Quad Cities would be fine.
ragina
Prospect, TN
The halfway point between Indianapolis and Gary, Indiana, is in Lafayette, Indiana.
Capitol City MI.
Kingdom City, MO
Eaton, OH
Bellevernon PA
Le Claire, IA
According to MapQuest.com, if you are traveling on I-65 and I-70, the halfway point is Indianapolis, Indiana. The whole trip is 356.50 miles, and Indianapolis is 175 miles between the two.
Independence, California is about the halfway point.
Corbin, KY
Lincoln,NE