The highway has been opposed by several organizations, notably the Illinois chapter of the Sierra Club and vocal residents of Long Grove, which lies directly in the path of the Illinois 53 extension.
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The combined 53/120 extension would form a large T shape in the center of Lake County, with the 120 bypass carrying through-traffic from U.S. Route 12 to the Tri-State Tollway around Gurnee.
Illinois | University of Illinois at Urbana-Champaign | Peoria, Illinois | Rockford, Illinois | Evanston, Illinois | Springfield, Illinois | Northern Illinois University | Cook County, Illinois | U.S. Route 66 | U.S. Route 1 | Illinois Institute of Technology | Joliet, Illinois | U.S. Route 6 | U.S. Route 101 | Route 66 | Rock Island, Illinois | Belleville, Illinois | Aurora, Illinois | U.S. Route 30 | Southern Illinois University | Quincy, Illinois | New Jersey Route 4 | Illinois River | European route E65 | U.S. Route 40 | Governor of Illinois | California State Route 1 | Wheaton, Illinois | Waukegan, Illinois | Naperville, Illinois |
It serves primarily central and east Rolling Meadows (east of Route 53), a significant part of Arlington Heights and a small part of Mount Prospect.