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Full-Text Articles in Engineering
Network-Wide Pedestrian And Bicycle Crash Analysis With Statistical And Machine Learning Models In Utah, Md Rafiur Rahman
Network-Wide Pedestrian And Bicycle Crash Analysis With Statistical And Machine Learning Models In Utah, Md Rafiur Rahman
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Recent trends in crashes indicate a dramatic increase in both the number and share of pedestrian and bicyclist injuries and fatalities nationally and in many states. Crash frequency modeling was undertaken to identify crash prone characteristics of segments and non-signalized intersections and explore possible non-linear associations of explanatory variables with crashes. Crowdsourced “Strava” app data was used for bicycle volume, and pedestrian counts estimated from nearby signalized intersections were used as pedestrian volume. Multiple negative binomial models investigated crashes at different spatial scales to account for different levels of data availability and completeness. The models showed high traffic volume, steeper …
Safety In Numbers: Models Of Pedestrian And Bicycle Crash Frequency And Severity At Signalized Intersections In Utah Using Innovative Measure Of Exposure, Ahadul Islam
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Recent trends indicate a dramatic increase in both the number and share of pedestrian and bicyclist injuries and fatalities nationally and in many states. This study aimed at understanding (geometric, traffic, operational, and other) factors associated with pedestrian and bicycle safety and also to assist in the prioritization and selection of countermeasures to improve pedestrian and bicycle safety at signalized intersections. Several negative binomial models were estimated to investigate factors affecting pedestrian and bicycle crash frequency. The models suggested several characteristics of the road network, land use, built environment, and neighborhood sociodemographics were significantly associated with more (or fewer) pedestrian …
Analysis Of Pedestrian And Bicycle Crashes In Michigan, Ahmed Abbas Ghubin Al-Zubaidi
Analysis Of Pedestrian And Bicycle Crashes In Michigan, Ahmed Abbas Ghubin Al-Zubaidi
Masters Theses
Vulnerable road users such as pedestrian and bicyclists are more likely to sustain a severe injury when they are involved in a crash with motor vehicles. Identifying the causes of crashes involving pedestrians and bicyclists is essential to reducing the number and the severity of such crashes. This study identified the causes and risk behaviors associated with pedestrian and bicycle crashes in Michigan by reviewing selected individual crash report (i.e., UD-10). Crash reports for all pedestrian and bicycle fatal crashes (K) and a sample of incapacitating injury crashes (A) from 2010 to 2014 were reviewed and typed individually using the …
Development Of Safety Performance Functions For Non-Motorized Traffic Safety, Hamidreza Ahady Dolatsara
Development Of Safety Performance Functions For Non-Motorized Traffic Safety, Hamidreza Ahady Dolatsara
Masters Theses
This study investigates the factors which affect the safety of non-motorized transportation within the influence area of intersections to enhance development of safety performance functions (SPFs). The scope of this study is limited to the four Michigan cities of Ann Arbor, East Lansing, Flint and Grand Rapids. Due to the current lack of research regarding the appropriate size of the influence area, this study investigates the distance of crashes relative to the center of 148 intersections to identify the most probable area of influence for different crash types. For motorized and non-motorized crashes, 240 ft. and 137 ft. are proposed, …
Development Of A Bicycle Level Of Service Methodology For Two-Way Stop-Controlled (Twsc) Intersections, Nathan R. Johnston
Development Of A Bicycle Level Of Service Methodology For Two-Way Stop-Controlled (Twsc) Intersections, Nathan R. Johnston
Master's Theses
This thesis fills a missing piece in research on multimodal performance measures for traffic on streets and highways. The Highway Capacity Manual (HCM) published by the Transportation Research Board (TRB) provides Level of Service (LOS) methodologies which enable engineers and planners to evaluate the overall performance of roadways and highways based on the physical characteristics of facilities. This allows for the evaluation of those facilities and offers a means for recognizing issues and planning, designing, implementing, and ultimately assessing improvements. Originally, level of service was developed for automotive traffic only, but with recent developments as part of the complete streets …
Spatial Factors Impacting Non-Motorized Exposures And Crash Risks, Farhad Abasahl
Spatial Factors Impacting Non-Motorized Exposures And Crash Risks, Farhad Abasahl
Masters Theses
This research investigates spatial factors, that impact non-motorized exposures and crashes, and examines the relationship between exposure at signalized intersections and crash frequencies involving pedestrians and bicycles at a census tract level. The four Michigan cities of Ann Arbor, East Lansing, Flint and Grand Rapids are examined. After completing an extensive literature review to provide a list of required data, 92 intersections are selected from the four cities to collect pedestrian and bicyclist counts. Five-year crash records, special attractions, non-motorized facilities and transportation infrastructure data for the four cities are gathered for the four cities. This data are later mapped …