Accessible Pedestrian Signals: A Guide to Best Practices (Workshop Edition 2010) (2011) / Chapter Skim
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Pages 81-92
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From page 81... ...
Accessible Pedestrian Signals: A Guide to Best Practice 81 Chapter 5: When to Install APS CHAPTER SUMMARY Th is chapter provides guidance on when and where APS should be installed. It contains information on requirements for installation and a tool for prioritizing APS installations.
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From page 82... ...
82 Chapter5: When to Install APS Where are APS Required? CURRENT PRACTICE Currently in the U.S., APS are typically installed upon request along a specifi c route of travel for a particular individual, or group of individuals who are blind or visually impaired.
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From page 83... ...
Accessible Pedestrian Signals: A Guide to Best Practice 83 ACCESSIBILITY STILL REQUIRED ADA Accessibility Guidelines are minimum guidelines for new construction or reconstruction, and must be applied to the maximum extent feasible in alterations, renovations, or additions. While the ADA does not require going back and reconstructing all intersections and locations, it does require improving accessibility when work is performed at a location.
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From page 84... ...
84 Chapter5: When to Install APS APS IN TRANSITION PLANS Some municipalities have considered the addition of APS at intersections as part of their ADA transition plan, but many have not. As part of their compliance with ADA, municipalities may need to establish a plan to prioritize and make decisions about installation of APS at "unaltered" intersections: Where a request for APS is received Where there is insuffi cient information for street crossing using non-visual clues
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From page 85... ...
Accessible Pedestrian Signals: A Guide to Best Practice 85 Prioritizing APS Installations Th e information regarding prioritizing intersections for installation of APS is not intended for application to new or reconstructed intersections. In new construction or reconstruction projects, it is appropriate to consider the Draft PROWAG as the best guidance available at this time (Isler memo, 2006)
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From page 86... ...
86 Chapter5: When to Install APS Where these conditions occur, it may be impossible for pedestrians who are visually impaired or blind to determine the onset of the WALK interval by listening for the onset of parallel traffi c. It would also be diffi cult to obtain usable orientation and directional information about the crossing from the cues that are available.
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From page 87... ...
Accessible Pedestrian Signals: A Guide to Best Practice 87 Th e parties responsible for rating the intersections vary according to the locality. In San Diego, a traffi c engineer and an O&M Specialist rate separate aspects of the intersections.
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From page 88... ...
88 Chapter5: When to Install APS • Pedestrian pushbutton location • Requests for APS APS PRIORITIZATION TOOL VALIDATION PROCESS Although prior rating scales included many relevant factors, the point values assigned to these factors were not thoroughly tested in a fi eld validation. Th e APS Prioritization Tool underwent validation through comparison with expert opinion from O&M Specialists and blind pedestrians.
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From page 89... ...
Accessible Pedestrian Signals: A Guide to Best Practice 89 • Th ere is a single bus route on the main street, which earns another point. Th e presence of public transit increases the likelihood that visually impaired pedestrians will travel at this intersection, thereby increasing the priority for APS.
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From page 90... ...
90 Chapter5: When to Install APS • Th e crosswalk width of 110 feet and speed limit of 45 mph on the main street earn the crosswalk four and fi ve points, respectively. Wider crosswalks and faster traffi c increase the crossing diffi culty and risk to visually impaired pedestrians, and APS may help expedite their crossing.
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From page 91... ...
Accessible Pedestrian Signals: A Guide to Best Practice 91 • During off -peak hours, there was enough parallel traffi c to provide audible cues (2 or more vehicles per cycle) about 75% of the time.
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From page 92... ...
92 Chapter5: When to Install APS
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