Evaluating critical lines and stations considering the impact of the consequence using transit assignment model -case study of London's underground network

2008 ◽  
Vol 42 (3) ◽  
pp. 291-310 ◽  
Author(s):  
Hiroshi Shimamoto ◽  
Fumitaka Kurauchi ◽  
Jan-Dirk Schmöcker ◽  
Michael G H Bell
Keyword(s):  
Transit Assignment ◽  
Model Case ◽  
Assignment Model ◽  
The Impact ◽  
Critical Lines

scholarly journals Estimation of Probable Maximum Precipitation (PMP) and Probable Maximum Flood (PMF) Using GSSHA Model (Case Study Area Upper Citarum Watershed)

2021 ◽  
Vol 893 (1) ◽  
pp. 012023
Author(s):  
Puji R A Sibuea ◽  
Dewi R Agriamah ◽  
Edi Riawan ◽  
Rusmawan Suwarman ◽  
Atika Lubis
Keyword(s):  
Model Simulation ◽  
Hydrologic Model ◽  
Model Case ◽  
Probable Maximum Precipitation ◽  
Maximum Precipitation ◽  
Hydrologic Analysis ◽  
Probable Maximum Flood ◽  
The Mean ◽  
The Impact

Abstract Probable Maximum Flood (PMF) used in the design of hydrological structures reliabilities and safety which its value is obtained from the Probable Maximum Precipitation (PMP). The objectives of this study are to estimate PMP and PMF value in Upper Citarum Watershed and understand the impact from different PMP value to PMF value with two scenarios those are Scenario A and B. Scenario A will calculate the PMP value from each Global Satellite Mapping of Precipitation (GSMaP) rainfall data grid and Scenario B calculate the PMP value from the mean area rainfall. PMP value will be obtained by the statistical Hershfield method, and the PMF will be obtained by employed the PMP value as the input data in Gridded Surface Subsurface Hydrologic Analysis (GSSHA) hydrologic model. Model simulation results for PMF hydrographs from both scenarios show that spatial distribution of rainfall in the Upper Citarum watershed will affect the calculated discharge and whether Scenario A or B can be applied in the study area for PMP duration equal or higher than 72 hours. PMF peak discharge for Scenario A is averagely 13,12% larger than Scenario B.

A multi-class transit assignment model for estimating transit passenger flows-a case study of Beijing subway network

2015 ◽  
Vol 50 (1) ◽  
pp. 50-68 ◽  
Author(s):  
Bingfeng Si ◽  
Liping Fu ◽  
Jianfeng Liu ◽  
Sajad Shiravi ◽  
Ziyou Gao
Keyword(s):  
Transit Assignment ◽  
Assignment Model ◽  
Passenger Flows ◽  
Beijing Subway

scholarly journals A Capacity-Restraint Transit Assignment Model When a Predetermination Method Indicates the Invalidity of Time Independence

2015 ◽  
Vol 2015 ◽  
pp. 1-12
Author(s):  
Haoyang Ding ◽  
Yu Bao ◽  
Sida Luo ◽  
Hanxia Shen ◽  
Wei Wang ◽  
...  
Keyword(s):  
Engineering Practice ◽  
Transit Assignment ◽  
Urban Transit ◽  
Simple Method ◽  
Assignment Method ◽  
Assignment Model ◽  
Traditional Research ◽  
Nanjing City ◽  
Assignment Models

The statistical independence of time of every two adjacent bus links plays a crucial role in deciding the feasibility of using many mathematical models to analyze urban transit networks. Traditional research generally ignores the time independence that acts as the ground of their models. Assumption is usually made that time independence of every two adjacent links is sound. This is, however, actually groundless and probably causes problematic conclusions reached by corresponding models. Many transit assignment models such as multinomial probit-based models lose their effects when the time independence is not valid. In this paper, a simple method to predetermine the time independence is proposed. Based on the predetermination method, a modified capacity-restraint transit assignment method aimed at engineering practice is put forward and tested through a small contrived network and a case study in Nanjing city, China, respectively. It is found that the slope of regression equation between the mean and standard deviation of normal distribution acts as the indicator of time independence at the same time. Besides, our modified assignment method performs better than the traditional one with more reasonable results while keeping the property of simplicity well.

Passenger Route Choice Behavior with Congestion Consideration

2013 ◽  
Vol 368-370 ◽  
pp. 1876-1880 ◽  
Author(s):  
Ying Zeng ◽  
Jun Li ◽  
Hui Zhu
Keyword(s):  
Choice Behavior ◽  
Route Choice ◽  
Transit Assignment ◽  
Transit System ◽  
Transit Network ◽  
Route Choice Behavior ◽  
Assignment Model ◽  
Proposed Model ◽  
Vehicle Capacity

Few studies have adequately focused on passenger route choice behavior with congestion consideration, or provided useful guidance on passenger route choice and hence the transit assignment model, which is the writing motivation of this paper. With congestion consideration, travel cost is assessed and and ways to reduce it also identified. Finally, an actual transit network of Chengdu is used as a case study to demonstrate the benefits of the proposed model. The result indicates that the vehicle capacity is an important factor that cant be ignored and a better understanding of passenger route behavior could significantly benefit public transit system.

scholarly journals Analysis of the Impact of Zakat, Infak, and Sadaqah Distribution on Poverty Alleviation Based on the CIBEST Model (Case Study: Jogokariyan Baitul Maal Mosque, Yogyakarta)

2018 ◽  
Vol 3 (2) ◽  
pp. 85-97 ◽  
Author(s):  
Salahuddin El Ayyubi ◽  
Henni Eka Saputri
Keyword(s):  
Poverty Alleviation ◽  
Absolute Poverty ◽  
Model Case ◽  
The Impact ◽  
Economic Studies ◽  
Special Region ◽  
Poverty Indexes

The Special Region of Yogyakarta is one of the provinces with a high incidenceof poverty onJava Island. The number of mosques and the increase of zakat funds, infak, and sadaqaheach year is not sufficientto reduce the number of those in poverty. If the mosque is able tomanage the zakat, infak, and sadaqahfunds well, it can be predicted that the mosque would reduce poverty and increase the welfare of the community. This study aims to analyze the impact of zakat, infak, and sadaqah distribution in reducing poverty based on the Center for Islamic Business and Economic Studies (CIBEST) model (case study: Jogokariyan Baitul Maal Mosque, Yogyakarta). The results of the study indicate that there is an increase in welfare and a decrease in material poverty, spiritual poverty, and absolute poverty, as seen from changes in the Islamic CIBEST’s poverty indexes formustahik households. Keywords: CIBEST Model, Jogokariyan Mosque, Poverty, ZIS

scholarly journals Frequency and Vehicle Capacity Determination using a Dynamic Transit Assignment Model

2019 ◽  
Vol 2673 (3) ◽  
pp. 574-585 ◽  
Author(s):  
Oded Cats ◽  
Stefan Glück
Keyword(s):  
Optimization Approach ◽  
Tactical Planning ◽  
Transit Assignment ◽  
Assignment Model ◽  
Planning Phase ◽  
Passenger Flows ◽  
Vehicle Capacity ◽  
Improve Service Quality ◽  
New Generation ◽  
The Impact

We integrate for the first time, to our knowledge, a dynamic transit assignment model into the tactical planning phase. The settings of service frequencies and vehicle capacities determine line capacity and have significant consequences for level-of-service and operational costs. The objective of this study is to determine frequency and vehicle capacity at the network level while accounting for the impact of service variations on users and operator costs. To this end, we propose a simulation-based optimization approach. The proposed model allows accounting for variations in service headways and crowding as well as their consequences for passenger flows distribution, all of which have not been accounted for in the tactical planning so far. Practical benefits of the model are demonstrated by an application to a bus network in the Amsterdam metropolitan area. This study contributes to the development of a new generation of methods that integrate reliability into the tactical planning phase to improve service quality.

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