Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities: A Guidebook (2017) / Chapter Skim
Currently Skimming:
Pages 68-77
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 68... ...
68 C H A P T E R 6 This chapter provides a methodology for assessing wayfinding and alignment challenges for pedestrians who are blind. The most important underlying principle in the design of pedestrian crosswalks is that the design should be intuitive for its users.
|
From page 69... ...
Wayfinding Assessment 69 Figure 6-1. Illustration of zone to determine the crossing location at roundabouts.
|
From page 70... ...
70 Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities: A Guidebook 6.1.2 Is Separation Provided Between the Sidewalk and the Curb (required by PROWAG-NPRM)
|
From page 71... ...
Wayfinding Assessment 71 parallel to the sidewalk. Detectable warning surfaces should be installed at the top of the ramp and at the junction with the sidewalk and aligned with the edge of the sidewalk to alert blind pedestrians of the presence of the ramp.
|
From page 72... ...
72 Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities: A Guidebook 6.2.2 Are the Curb Ramp Slopes Aligned with the Crossing? All curb ramps should be oriented so that the running slope is in the same direction as the direction of travel on the crosswalk.
|
From page 73... ...
Wayfinding Assessment 73 of the ramp be square to the gutter or grade break at the base of the ramp. Pedestrians who are blind also tend to use the gutter and curb line as an alignment cue and will often travel across the roadway on a path that is perpendicular to the curb line.
|
From page 74... ...
74 Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities: A Guidebook 6.3 Maintaining the Correct Heading While Crossing Staying within the crosswalk area while crossing can be critical to safety, driver expectation, and orientation. Critical zones for this task are the area of the crosswalk within the street as shown in the Figure 6-4.
|
From page 75... ...
Wayfinding Assessment 75 6.3.1 Is the Crossing Configured at the Shortest Distance Practical? The shorter the crossing, the less exposure and less opportunity there is for the pedestrian to veer outside the crosswalk area.
|
From page 76... ...
76 Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities: A Guidebook Figure 6-5. Illustration of zone for island crossings at a roundabout.
|
From page 77... ...
Wayfinding Assessment 77 from the vehicular right-of-way. Painted islands are inaccessible (not detectable)
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.