The Chicago Southland Fiber Network (CSFN) project is collaboration among many state and local agencies, including the Illinois Department of Transportation (IDOT), to link infrastructure in south suburban Cook County through a fiber optic backbone bordering the I-57 corridor. This network will link south suburban municipalities, public safety sites, community colleges, two major Cook County anchor locations (Markham Courthouse and Oak Forest Hospital), and other sites. The project has already installed 65 percent of the duct support required for the CSFN project along the I-57 corridor.