{"428881":{"#nid":"428881","#data":{"type":"event","title":"PhD Defense by Felipe Castrillon","body":[{"value":"\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003ESchool of Civil and Environmental Engineering\u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003EPh.D. Thesis Defense Announcement\u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003ETheoretical Analysis of the Effects of Bus Operations on Urban Corridors and Networks\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003Eby:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003EFelipe Castrillon\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003EAdvisor:\u0026nbsp; \u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003EDr. Jorge Laval (CEE)\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003ECommittee Members:\u0026nbsp; \u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003EDr. Randall Guensler (CEE), Dr. Michael Hunter (CEE), Dr. Kari Watkins (CEE), Dr. Bistra Dilkina (CS)\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003EDate \u0026amp; Time:\u003C\/strong\u003E Tuesday, August 11, 2015 at 2:30pm\u003C\/p\u003E\u003Cp align=\u0022center\u0022\u003E\u003Cstrong\u003ELocation:\u003C\/strong\u003E\u0026nbsp; 122 Sustainable Education Building (SEB)\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003E \u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003EBus systems have a large passenger capacity when compared to personal vehicles and thus have the potential to improve urban mobility.\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003EHowever, buses that operate in mixed vehicle traffic can undermine the effectiveness of the road system as they travel at lower speeds, take\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003Elonger to accelerate and stop frequently to board and alight passengers. In traffic flow jargon, buses are slow-moving bottlenecks that have\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003Ethe potential to create queue-spillbacks and thus increase the probability of gridlock. Currently, traditional metropolitan transportation\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003Eplanning models do not account for these negative effects on roadway capacity. Also, research methods that study multimodal operations are\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003Eoften simulated or algorithmic which can only provide specific results for defined inputs.\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003EThe objective of this research is to model and understand the effects of bus operations (e.g., headway, number of stops, number of routes) on\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003Esystem performance (e.g. urban corridor and network vehicular capacity) using a parsimonious analytical approach with a few parameters.\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003EThe models are built using the Macroscopic Fundamental Diagram (MFD) of traffic which provides aggregate measures of vehicle density\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003Eand flow. Existing MFD theory, which accounts for corridors with only one vehicle class are extended to include network roadway systems\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003Eand bus operations. The results indicate that buses have two major effects on corridors: the moving bottleneck and the bus short-block effect.\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003EAlso, these corridor effects are expanded to urban networks through a vehicle density-weighted average. The models have the potential to\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003Etransform urban multimodal operations and management as they provide a simple tool to capture aggregate performance of transportation\u003C\/p\u003E\u003Cp\u003Esystems.\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003E\u003C\/p\u003E\u003Cp align=\u0022LEFT\u0022\u003E\u0026nbsp;\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Theoretical Analysis of the Effects of Bus Operations on Urban Corridors and Networks"}],"uid":"27707","created_gmt":"2015-07-29 07:27:26","changed_gmt":"2016-10-08 02:12:10","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2015-08-11T15:30:00-04:00","event_time_end":"2015-08-11T17:30:00-04:00","event_time_end_last":"2015-08-11T17:30:00-04:00","gmt_time_start":"2015-08-11 19:30:00","gmt_time_end":"2015-08-11 21:30:00","gmt_time_end_last":"2015-08-11 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}