Chicago’s Forgotten Mile of Historic Route 66

Just outside Chicago, a mile-long stretch of historic Route 66 remains closed to the public, fenced off and deteriorating hundreds of feet above the surrounding landscape near Joliet Road. The abandoned section, once a vital artery of American cross-country travel, has been inaccessible for years due to structural instability and safety concerns, with no clear timeline for repair or reopening.

The closed segment runs along an elevated alignment originally constructed in the 1940s to bypass at-grade crossings and improve traffic flow along the iconic highway. Over time, weathering, lack of maintenance, and shifting infrastructure priorities left the viaduct in a state of progressive decay. Local transportation officials have confirmed that inspections reveal significant concrete spalling, corroded rebar, and compromised support structures, making the span unsafe for pedestrian or vehicular access.

Despite its cultural significance as part of the Mother Road, the stretch has not been prioritized for restoration amid competing infrastructure demands across the Chicago metropolitan area. Preservation advocates have raised concerns that without intervention, the viaduct could face partial collapse or require costly emergency demolition. However, no funding has been allocated for a full structural assessment or rehabilitation project as of early 2026.

Efforts to document and preserve the history of this section have been led by local historical societies and Route 66 enthusiast groups, who argue that the viaduct represents a unique engineering artifact from the highway’s mid-20th-century modernization. Photographic surveys and oral histories have been collected, but physical access remains restricted due to liability risks.

As of April 2026, the fenced-off segment continues to stand as a visible reminder of both the glory and neglect surrounding America’s most famous highway. While other portions of Route 66 in Illinois have been preserved, marked, or repurposed for tourism and recreation, this particular stretch remains isolated — officially off-limits, slowly crumbling, and awaiting a decision on its future.