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CDOT presents tactile directional indicators and shared boarding concepts to reduce bike–pedestrian conflicts at bus stops
Summary
CDOT’s Brad Topol presented design options to the CTA ADA advisory committee to separate bike lanes from pedestrian and bus‑loading spaces using raised bike lanes, vegetation, and tactile directional indicators (TDIs) that guide blind and low‑vision travelers to designated crossings.
Brad Topol of the Chicago Department of Transportation described updated street design standards intended to reduce conflicts between bicyclists and people walking or boarding buses. His presentation emphasized physical separation where space allows (raised bike lanes at street level, vegetated furniture zones, and bus‑boarding islands at sidewalk level) and tactile directional indicators (TDI) to provide positive wayfinding cues for blind and low‑vision travelers.
“Our preferred design...is to separate modes as much as possible,” Topol said, explaining examples from Milwaukee Avenue, San Francisco, Seattle, Montgomery County and other cities. He noted newer detectable-surface shapes such as trapezoidal panels and flat-top bars used for positive guidance, and said CDOT is piloting TDIs offset from bike lanes by 12–24 inches in Chicago projects.
Topol acknowledged tradeoffs in constrained locations. He described “shared boarding areas” that maintain a minimum ADA loading width (9 feet) but reduce overall space, and said design adjustments aim to balance wheelchair‑maneuvering requirements with bicycle throughput. He said CDOT coordinated initial designs with the Mayor’s Office for People with Disabilities (MOPD) and will continue stakeholder outreach.
Committee members raised safety concerns for blind riders and wheelchair users when ramps deploy into shared or narrow spaces and urged expanded testing with disability organizations and bus engineering. Topol said some U.S. standards (e.g., PROWAG) provide limited guidance for these hybrid conditions, so CDOT is drawing on other cities’ pilots and will continue evaluating materials and TDI configurations.
Staff agreed to invite bus engineering and bus operations to a future ADA advisory meeting to address vehicle‑specific interior and boarding deployment issues.
