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oai:www.ideals.illinois.edu:2142/50496 2023-07-11 col_2142_5131 col_2142_14770 com_2142_5130 com_2142_3518 com_2142_234

Ouyang, Yanfeng Wu, Zhuoran 2014-09-16T17:18:02Z 2014-09-16T17:18:02Z 2016-09-22T20:59:16Z 2014-08 2014-09-16 2014-08 Daganzo (2010) proposed a hybrid structure combining grid scheme in the center and hub-spoke scheme in the periphery to design a competitive transit network on a square region. A nonlinear continuous optimization model is built upon this structure to minimize total transit system cost. One of this model’s main limitations is the uniform trip demand assumption, which constrains its applicability in real-world. Another pitfall is that lines branch in peripheral region, resulting in expanded facilities and longer waiting time for transit services. To bridge these gaps, a hybrid transit network layout with non-branching routes is proposed. To capture spatial heterogeneity of trip demand, method of deriving zone-to-zone trip demands from continuous demand density function is borrowed from Smith (2014). To obtain optimal network layout and vehicle dispatching frequencies, a mathematical model that minimizes transit system cost based on various zone-to-zone demands is formulated. By allowing different stop spacing in the central and peripheral regions, more flexibility is given to the structure in obtaining the solutions. A series of scenarios under heterogeneous demand distribution in various transit mode choices and demand levels are designed to test impacts of these critical factors on optimal solutions. Results show that BRT is the most competitive mode while metro’s performance increases largely when demand is higher. In addition, as trip rate increases, system cost per passenger will be reduced. Compared with the branching hybrid model (Smith, 2014), the proposed model in this thesis shows better performance in cost saving. Several interesting future research topics are inspired by the outcomes of this thesis, including extensions to network structures, model extensions as well as multimodal hierarchical transit network design. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2014-07-25T17:51:08Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Wu_Zhuoran.pdf: 2243911 bytes, checksum: b6c6bb97dd0293524e644850e3b90afd (MD5) Wu_Zhuoran.pdf: 1833593 bytes, checksum: 9a62edcc9090eeff577c8e39db8dfbea (MD5) Made available in DSpace on 2014-09-16T17:18:02Z (GMT). No. of bitstreams: 2 Zhuoran_Wu.pdf: 1833593 bytes, checksum: 9a62edcc9090eeff577c8e39db8dfbea (MD5) license.txt: 4057 bytes, checksum: e8a3239d2c20dcc56a19080c2082b71e (MD5) Embargo set by: Seth Robbins for item 50607 Lift date: 2016-09-16T17:18:17Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 50607 on 2016-09-22T20:59:16Z. http://hdl.handle.net/2142/50496 en copyright 2014 Zhuoran Wu transit network design non-branching hybrid structure optimization model heterogeneous trip demand Non-branching hybrid transit network design under heterogeneous demand text Civil & Environmental Eng 1251 Civil Engineering 0106 University of Illinois at Urbana-Champaign Thesis M.S. MS:Civil Engineering -UIUC 10KS0106MS