Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities (2011) / Chapter Skim
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Pages 24-33
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From page 24... ...
This experimental design allowed the team to control for confounding factors. By using the same participants for baseline and after-treatment data collection, each participant served as his or her own control, which provided more statistical power when using a relatively small number of participants.
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" While the responses to these survey questions are subjective, they add an important feature to the analysis. The results are presented in Chapter 5 along with more objective performance assessment, such as the average delay time.
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an increase in the total pedestrian travel time associated with crossing, (b) exposure to risk by crossing at an inappropriate (i.e., unmarked)
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The team recommended testing these treatment combinations concurrently at two CTLs of the same intersection in order to make most efficient use of project resources and to allow for a direct comparison using the same participants. • Channelized turn lane: The team recommended installation of sound strips and lane delineators to provide additional auditory information to blind pedestrians about traffic patterns in the CTL and to distinguish that traffic from adjacent through movements.
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From page 28... ...
roundabout sites. Agencies and companies contacted included Maryland State Highway Administration; Kansas DOT; Washington State DOT; New York State DOT; North Carolina DOT; California DOT; Florida DOT; City of Clearwater, FL; City of Kennewick, WA; City of Modesto, CA; City of Bend, OR; City of Portland, OR; City of Tucson, AZ; City of Golden, CO; Town of Vail, CO; MTJ Engineering; Roundabouts, USA; Ourston Roundabout Engineering; and Alternate Street Design.
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From page 29... ...
The treatments were sound strips that were intended to increase the awareness of pedestrians of approaching vehicles at the northwest corner (SS-ONLY) and sound strips in combination with a pedestrian-actuated flashing beacon that was intended to increase driver yielding behavior at the southeast corner (SS+FB)
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The left image shows an aerial photograph with the studied crosswalks highlighted on the southwest and northeast approaches of Davidson Street. The right image shows a pedestrian-level photograph of the roundabout entry leg.
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From page 31... ...
The left image shows an aerial photograph with the studied crosswalk highlighted on the southwest approach of Pullen Road. The right image shows a photograph of the studied crosswalk taken from a nearby building.
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This installation resulted 32 This figure shows two photographs of the studied single-lane roundabout at the intersection of Golden Road and Ulysses Street in Golden, CO. The left image shows an aerial photograph with the studied crosswalks highlighted on the east approaches of Golden Road.
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From page 33... ...
Pavement markings were as shown in Figure 11 and emphasized the upslope of the RCW. Figure 12 shows a photograph of the PHB installation at the northwest approach of the roundabout on Golden Road.
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