In Chicago you can only talk hands free. ORD is indeed part of the city, so is most of the Kennedy expressway (I-190/I-90) from the airport (part in Rosemont). So, yes it is a legal issue, but is rarely enforced by cops.
Last edited by NWA747SNN; Feb 16, 2008 at 1:15 pm
Reason: To add that from I-190 partly in Rosemont