Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities: A Guidebook (2017) / Chapter Skim
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Pages 101-103
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101 A P P E N D I X A A key component of accessibility for a pedestrian who is blind is the availability of adequate audible cues to assure that a blind traveler can independently navigate the roundabout or CTL. The availability of audible cues is related to the presence of noise sources in the vicinity of the site, as well as obstacles that may interfere with the ability to clearly hear approaching vehicles.
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102 Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities: A Guidebook traffic from background noise. Common examples of this include nearby freeways (especially at interchanges)
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From page 103... ...
Discussion of Audible Environment and Noise Effects 103 Location and Separation of Traffic Control Devices The location of traffic control devices and the separation of two or more (audible) devices can impact audibility at the crosswalk, as well as how well the devices themselves can be heard and distinguished from each other.
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