Pace, the suburban transit provider in the Chicago region, is expanding service on its I-55 express bus routes. The I-55 express bus routes operate on sections of the shoulder of Stevenson Expressway when the facility is congested. The routes have experienced both increased ridership and improved on-time performance. The express service is part of the Bus on Shoulders pilot project which is a cooperative effort of Pace, Illinois Department of Transportation, and the Illinois State Police. The project received funding for signage from the Congestion Mitigation and Air Quality (CMAQ) Improvement program and CMAP posted a short video on the program launch. The success of this project to date indicates that such services merit further study and possible additional deployments, contingent on safety and operational success.