Transient flushing is also a common side effect of alcohol, particularly in heavy drinkers. It is due to acetaldehyde, the main breakdown product of alcohol. Acetaldehyde is thought to cause flushing by stimulating release of histamine.
The right two lanes of the Tri-State Tollway become exit only for the ramp connection to Interstate 94/Bishop Ford (Calumet) Expressway west (north) to Chicago and Illinois 394/Bishop Ford (Calumet) Expressway south to Crete and Danville. An END Interstate 294 sign is posted on this guide sign.
North of Ottawa, Illinois 23 has a full diamond interchange with Interstate 80. This is the last full interchange Illinois 23 has south of its terminus at Harvard. Illinois 23 has two additional concurrencies with U.S. Route 34 and U.S. Route 52, though no notable cities are present between Ottawa and DeKalb.