Need for additional research
At a meeting in September, 2005, the project panel for NCHRP 3-62 developed the following list of issues for additional research:
- Guidance on the need for pushbutton APS on side streets.
- Wayfinding/beaconing (NEI project may address this need)
- Location/size/color of tactile arrow
- Speech message clarity (consistency, programming and downloading messages, standardized library)
- Tactile map (consistency, availability, info on median refuge, guidelines)
- Cold weather issues (future follow-up on case studies, comparison study)
- Tone types (acceptability to nearby residences, which are appealing)
- APS effect on general pedestrian population (tie-in to tone acceptability study?)
- Sound volume (best response to ambient sound, range and speed of response, range of decibel levels, resource is FHWA noise study office)
- Beaconing (volume, duration after press)
- Combining speech message and tones
- Audible message during flashing DONT WALK (tone vs. speech, countdown)
- Design of curb ramps (use in orientation/wayfinding, integration with signal design, effects on pole location)
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