Dan Ryan Expressway (I-90/94) Reconstruction

Client

IDOT, District 1

Location

Chicago, Illinois

Construction Cost

$825 Million

Key Staff

Rosalva Adan
D. David Moses, PE
Robert Rose, PE

The Dan Ryan Expressway (I-90/94) is one of the world’s busiest freeway systems, with 14 to 16 lanes of traffic and more than 330,000 vehicles per day. BB&A prepared design plans for both the rehabilitation of two miles of elevated structure from north of 15th Street down to 28th Street and for the reconstruction of more than two miles of freeway from 31st Street to 47th Street.

The project’s rehabilitation work also included new lighting and drainage collector systems, as well as new freeway guide signs. High-mast lighting was used to minimize visual clutter and improve uniform distribution of light. 

The project’s rehabilitation work also included new lighting and drainage collector systems, as well as new freeway guide signs. High-mast lighting was used to minimize visual clutter and improve uniform distribution of light.

The project also included the reconstruction and modification of 14 ramps, which resulted in the reconfiguration of two interchanges. Complex traffic maintenance plans helped mitigate conflicts incurred by the construction to major businesses and organizations.

Work on the two-mile elevated structure included structural steel retrofits, parapet wall repairs, and deck joints. This portion of the project consisted of nine structures, including those spanning the Chicago River and I-55 (Stevenson Expressway). 

Aesthetic improvements include rusticated concrete surfaces, prototype wall medallions designed by students from Little Black Pearl Art and Design Center and specially coated black fencing.