Quoted from MrBally:I-294, the Tri-state Tollway is well worth the extra miles and toll expense. Purchase an iPass transponder at the first Oasis and you can immediately use the Open Road Tolling lanes. And you get tolls for half the cash price with a passenger vehicle. When towing a trailer, no discount, but you still get the Open Road Tolling lane access.
Take it easy; Take the Tollway. The Famous Illinois Tollway....
» YouTube video
I've heard it's cheaper and faster to drive through the iPass lane without a transponder like a real out-of-towner.