Summary
The City of St. Louis Board of Public Service is soliciting sealed proposals from qualified construction contractors for the Downtown Multimodal Arterial Improvements project on 4th Street, Convention Plaza, and Washington Avenue in Downtown Saint Louis, Missouri. The project covers approximately 1.04 miles on 4th Street from Chouteau Avenue to Convention Plaza, 0.75 miles on Washington Avenue from 3rd Street to 14th Street, and 0.07 miles on Convention Plaza, and includes traffic calming, lane reduction, curb extensions, median refuge islands, signal optimization, a two-way cycle track with green-colored pavement, and bicycle signals. Bids were opened on June 23, 2026 and the open bidding window runs through July 28, 2026 for this federally supported transportation improvement.