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Chicago Department of Transportation Bicycle Program

Chicago, Illinois

Market Sector

Mobility, Planning, and Management


Complete Streets

Services Provided

Planning, Design



Related Links

A national leader in the design and implementation of Complete Streets and innovative bicycle facilities, T.Y. Lin International (TYLI) has provided planning, engineering, and in-house staff support, to the City of Chicago’s Bicycle Program within the Chicago Department of Transportation (CDOT) since 1997.

Most recently, TYLI fulfilled Chicago Mayor Rahm Emanuel’s goal to install 100 miles of protected and buffered bicycle lanes in four years. TYLI developed Phase I planning studies, Phase II engineering design drawings and conducted Phase III construction services for the implementation of new, innovative on-street bikeways, including protected bike lanes, buffered bike lanes, and neighborhood greenways.

Project Highlights:

  • The 1.2-mile Dearborn Street Protected Bike Lane is the nation’s first protected bicycle lane in a central business district and the backbone for a growing network of protected bike lanes in Chicago’s Loop. The project included the installation of thirteen bicycle traffic signals that have dramatically increased intersection compliance, green markings to highlight driveways and alleys, and fiberglass bridge plates to improve comfort for bicyclists on the Dearborn Bridge.
  • The Milwaukee Avenue Protected Bike Lane runs along the United States’ busiest street for bicycling, connecting dense neighborhoods and commercial corridors to downtown Chicago. The lane, which also provides 6,000 bicyclists each day with a first-class route to six other protected and buffered bike lanes, features 1.5 miles of protected bike lanes, concrete curb separation, and Chicago’s first “bike passing lane.”
  • The Broadway Road Diet and Protected Bike Lane has made this vibrant, 1.0 mile commercial corridor more comfortable and efficient for pedestrians, bicyclists, and transit riders by reducing travel lanes from four to three and incorporating protected bike lanes, buffered bike lanes, and a continuous two-way left turn median.
  • The Kinzie Street Protected Bike Lane is the first protected bike lane in Chicago. Fast-tracked by CDOT, TYLI successfully advanced the 0.5-mile project in less than one month from conception to construction.
  • The Berteau Avenue Neighborhood Greenway is Chicago’s first neighborhood greenway. TYLI’s design created a low-stress street that prioritizes bicyclists and pedestrians by including contraflow bike lanes, traffic calming structures, improved stormwater management, a reduced posted speed limit, and bicycle traffic signals. TYLI has overseen the installation of 1.5 miles of neighborhood greenways and is designing an additional 8.0 miles to be installed using federal funding.
Broadway Road Diet and Protected Bike Lanes – #10 Best Bike Lane in the Country, 2014
National Bike Advocacy Group, PeopleforBikes
Dearborn Street Protected Bike Lanes - Best Bike Lane in the Country, 2013
National Bike Advocacy Group, PeopleforBikes