City advances tactile 3D intersection models after focus-group feedback

City of Bend staff presented a progress update March 26 on prototype tactile 3D intersection models intended as an educational and wayfinding aid for people who are blind or have low vision.

Derek Hoffower, the city’s mobility programs manager, summarized a focus group that tested early models and said participants preferred "the simpler the model the better," adding that larger models and clear tactile keys helped users understand traffic flow and exit points. The prototypes under development include single- and double-lane roundabouts, a protected crossing, and a skewed intersection. Staff and consultants are exploring a layered UV-resin card that creates raised dots (a braille-like tactile surface) as a lower-cost, easier-to-distribute alternative to bulky 3D prints.

Derek described other design requests from participants: raised crosswalk and pole features, a braille key explaining surface meanings, and a consistent orientation (e.g., north) so users can comprehend how an intersection connects to adjacent streets. The models are being considered for storage and checkout at the library or city hall, and staff said a second, more public focus group is anticipated in late May or early June to test revised models.

The update also covered long-term integration ideas: combining tactile models with audio clues or an app (e.g., an RFID or phone-based file that plays intersection descriptions) so users can plan entire routes rather than single intersections. Staff noted that younger users often rely more on audio than braille and that pilot wayfinding routes this summer will test how technologies can complement the tactile models.

Next steps: staff will invite KOAC members to the second focus group, pilot a smaller UV-resin card model for circulation testing, and refine models based on additional feedback.