United States Department of Transportation
i
Countdown Pedestrian Signals (CPS) Legibility and Comprehension without Flashing Hand: Phase I and Phase II Final Report
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2022-04-01
[PDF-1.15 MB]
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Edition:Phase I and Phase II Final Report
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Abstract:The purpose of this study was to conduct two human factors field studies examining the utility of the presence of the Flashing Don't WALK (FDW) icon (i.e., the flashing hand) during the countdown pedestrian signal (CPS). Phase I examined pedestrians' comprehension of the CPS with and without the FDW signal, and the effect of removing the FDW on pedestrians with low vision. Three results were found: pedestrians were more likely to consider crossing with the CPS Alone than with the CPS + FDW; healthy, young participants had little difficulty judging the time required to cross for three different distances without changing their speed; and the removal of the FDW from the CPS + FDW signal had no negative impact on low-vision pedestrians' decisions to cross during the CPS. Phase II further evaluated the effect of removing the FDW from the CPS by observing pedestrians' natural behavior at two intersections. Participants were naturally observed pedestrians at two intersections. Following a baseline period, the FDW was removed from the CPS signal. Data were collected immediately after FDW removal and six months later. Regardless of the CPS present, pedestrians were likely to begin crossing during the pedestrian change interval. Finishing times show significantly fewer people in the crosswalk after the cross-traffic was released at three of the four sites during the CPS alone follow-up condition than during the CPS + FDW condition.
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