Location: I-255 and Camp Jackson Rd, Cahokia Reassurance shield after the Route 157 interchange. Location: I-255 and Camp Jackson Rd, Cahokia 1 miles to Route 3 north. Location: I-255 and Route 3, Dupo In a quarter mile, exit for Illinois 3/Great River Road north towards East St. Louis. Location: I-255 and Route 3, Dupo Exit … Continue reading Interstate 255, IL-157 to IL-3