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Research questions:
• What paths did cyclists ride through the
selected shared spaces intersections?
• Did cyclists ride t...
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Duncan shared space poster_tcs_2016

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Allison Duncan

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Duncan shared space poster_tcs_2016

  1. 1. Research questions: • What paths did cyclists ride through the selected shared spaces intersections? • Did cyclists ride through the shared space intersections differently than non-shared space intersections? Understanding Shared Space: an Examination of Cyclists and Shared Space Projects Allison B. Duncan, PhD Portland State University Methods • Video analysis of 1750 cyclists riding through 3 shared space intersections and 3 control intersections. • Cyclist paths were plotted from videos taken during the summer of 2014. Path differs from a route by its scale and is defined at the intersection scale as the course taken when riding through an intersection. • Each path was plotted over a site plan and the rele- vant variables analyzed. • Sidewalk and crosswalk use were two variables ana- lyzed. Study sites: 1. Elwick Square 2. Coventry & Coventry control 3. Poynton Introduction: There is growing interest in making our streets safer for vulnerable users. Shared space, an urban design and traffic calming technique, is touted to improve the safety of vulnerable users. It involves removal of a street’s traffic control elements (curbs, signs, lane markings, etc.) so the road- way becomes an integral component of the surrounding urban fabric. The goal is to open the space to all users equally. Europe has implemented many shared space projects and interest in growing in the United States. This is a newer area of study; the concept has only been around since the 1980’s. The majority of existing research has focused on pedestrians as the primary vulnerable user group. This research focused on how bicycle riders use shared space intersections. Coventry, England. Control intersection Coventry, England. Shared intersection Results: • Chi Square tests run on the pooled data showed a significant, large relationship between site and sidewalk use X2 (5) = 469.3, p =.000. X2 tests did not find a significant association between site and crosswalk use. • Shared sites and sidewalk use showed a signifi- cant, medium association X2 (2) = 178.0, p=.000. • Control sites and sidewalk use showed a signif- icant, large association X2 (2) = 233.9, p=.000. • Shared sites and crosswalk use showed a sig- nificant, small association X2 (4) = 17.1, p=.002. Conclusions: Observations showed that cyclists rode both in the road and/or on the sidewalk for both types of intersections. When comparing both shared and control sites, my research found that a significant proportion of cyclists would ride on the side- walk if it was accessible for either intersection type. Addi- tionally, I found that cyclists were more likely to ride through the crosswalks of shared space intersections than control in- tersections. This shows that even when calmed or not, many riders preferred to avoid riding near vehicles when possible through the study sites. Acknowledgments: This research was generously support- ed by a National Institute for Transpor- tation and Communities (NITC) Dis- sertation Fellowship 64% 88% 62% 42% 33% 18% 25% 13% 0.50% 2% 0.50% 3% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Coventry cntrl [n=422] Elwick Sq (shared) [n=357] Poynton (shared) [n=206] Coventry (shared) [n=490] Site Sidewalk and Crosswalk use:observedpercentages Sidewalk use Crosswalk use Veer to crosswalk Observational results: Selected variables Ashford, Elwick Square England. Shared intersection Poynton, England. Shared intersection Example of possible cyclist paths through a study site: