The $162 MM, 6-mile project, runs from Chicago's 22nd Street near the McCormick Place Convention Center south to 67th Street.
Traffic volumes through this section of Lakeshore Drive range from 110,000 cars per day on the north end to 24,000 cars per day on south end. Lakeshore Drive is built as an eight lane boulevard.
By comparison, Memorial Drive and the I-70 depressed and elevated lanes combined carry approximately 90,000 cars per day through downtown St. Louis.
The six mile rebuild of Lakeshore Drive cost $162,000,000, or about $27,000,000 per mile. The section of the depressed and elevated lanes of I-70 for possible replacement with a new Memorial Drive runs about one mile - from the Poplar Street Bridge on the south to Cole on the north.
The considerations of the two situations are similar - improving waterfront/cultural/recreational access, civic beautification, maintaining traffic flow and enhancing pedestrian access.
Chicago developed a landscaped boulevard to enhance its waterfront area. St. Louis has the same opportunity.