TY - GEN
T1 - Assessing vulnerability envelope of the intercity railway network for the Greater Bay area
AU - Yang, Haihua
AU - Chen, Anthony
AU - Ryu, Seungkyu
PY - 2018/1/1
Y1 - 2018/1/1
N2 - According to the national development strategy of the Greater Bay Area (GBA), the intercity railway network of the Pearl River Delta region will be further developed and will become the backbone of the GBA's transportation system in the next decade. However, similar to other transportation networks, human activities or natural hazards may cause disruptions to the railway network and lead to huge negative socio-economic impacts. Thus, to minimize the disruption risk for the railway network, the assessment of network vulnerability is indispensable. In the relevant studies, the research of vulnerability envelope (i.e., the upper and lower vulnerability bounds) can consider all possible combinations while avoiding the combinatorial complexity of enumerating multi-disruption scenarios, which is more suitable for assessing the railway network vulnerability. Specifically, the vulnerability envelope problem is formulated as a binary integer bi-level program (BLP). The upper-level subprogram maximizes or minimizes the remaining network travel throughput under a given number of disrupted links, which corresponds to the upper and lower vulnerability bounds. The lower-level subprogram checks the connectivity or usability of each origin-destination (O-D) pair under a network disruption scenario. By identifying the best and worst scenarios associated with geographical impact, this study assesses the latest regional railway network plan of GBA and presents some insights for the plan. As a new regional railway network plan is under planning in this year, the results of this study could provide decision-making support for the railway planners and managers.
AB - According to the national development strategy of the Greater Bay Area (GBA), the intercity railway network of the Pearl River Delta region will be further developed and will become the backbone of the GBA's transportation system in the next decade. However, similar to other transportation networks, human activities or natural hazards may cause disruptions to the railway network and lead to huge negative socio-economic impacts. Thus, to minimize the disruption risk for the railway network, the assessment of network vulnerability is indispensable. In the relevant studies, the research of vulnerability envelope (i.e., the upper and lower vulnerability bounds) can consider all possible combinations while avoiding the combinatorial complexity of enumerating multi-disruption scenarios, which is more suitable for assessing the railway network vulnerability. Specifically, the vulnerability envelope problem is formulated as a binary integer bi-level program (BLP). The upper-level subprogram maximizes or minimizes the remaining network travel throughput under a given number of disrupted links, which corresponds to the upper and lower vulnerability bounds. The lower-level subprogram checks the connectivity or usability of each origin-destination (O-D) pair under a network disruption scenario. By identifying the best and worst scenarios associated with geographical impact, this study assesses the latest regional railway network plan of GBA and presents some insights for the plan. As a new regional railway network plan is under planning in this year, the results of this study could provide decision-making support for the railway planners and managers.
KW - Analysis
KW - Intercity railway network
KW - Modeling
KW - Network vulnerability envelope
UR - http://www.scopus.com/inward/record.url?scp=85064717867&partnerID=8YFLogxK
M3 - Conference article published in proceeding or book
AN - SCOPUS:85064717867
T3 - Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018
SP - 607
EP - 614
BT - Transportation Systems in the Connected Era - Proceedings of the 23rd International Conference of Hong Kong Society for Transportation Studies, HKSTS 2018
A2 - Gu, Weihua
A2 - Wang, Shuaian
PB - Hong Kong Society for Transportation Studies Limited
T2 - 23rd International Conference of Hong Kong Society for Transportation Studies: Transportation Systems in the Connected Era, HKSTS 2018
Y2 - 8 December 2018 through 10 December 2018
ER -