Curious question here if it's okay to ask on this thread. I'm thinking about a short trip to the Chicago area from Indy around the 4th of July and wanted to clinch some roadways and see newly updated parts of the tollways there. On a Sunday I'd drive north on the Tri-State (from the Edens via Chicago) north to Milwaukee and southwest on I-43 to Beloit before heading south along I-90 all the way toward the Tri-State. I would then backtrack my way back to drive along I-355 for its entirety.
My question, and a apologize if this has been asked elsewhere before, is could I buy an EZPass for primarily that one day if I'm going to be on all those tollways. Typically I just visit the cash booths along those highways. And if its feasible, should I buy the pass through Illinois or Indiana?
If you buy an EZ-Pass in Indiana, it will work in Illinois as IPass and EZ-Pass are completely interchangeable. It's honestly your choice which agency you want to go through, as it's really a wash either way (unless Indiana has a different pricing plan for IPass. I forget the policy on that).
However, you can't do a one-day purchase. Once you have it, it's registered to you. The good news is that, after the initial up front fee, you only pay as you use it. Also, keep in mind that it will work on any tollway on the IPass or EZ-Pass system.