Cascading failure with preferential redistribution on bus–subway coupled network

2021 ◽  
pp. 2150103
Author(s):  
Sonnam Jo ◽  
Liang Gao ◽  
Feng Liu ◽  
Menghui Li ◽  
Zhesi Shen ◽  
...  
Keyword(s):  
Public Transport ◽  
Failure Process ◽  
Vital Role ◽  
Urban Transport ◽  
Traffic Load ◽  
Transport Systems ◽  
Cascading Failure ◽  
Passenger Flow ◽  
Urban Public Transport ◽  
Overall Performance

Robustness studies on integrated urban public transport networks have attracted growing attention in recent years due to the significant influence on the overall performance of urban transport system. In this paper, topological properties and robustness of a bus–subway coupled network in Beijing, composed of both bus and subway networks as well as their interactions, are analyzed. Three new models depicting cascading failure processes on the coupled network are proposed based on an existing binary influence modeling approach. Simulation results show that the proposed models are more accurate than the existing method in reflecting actual passenger flow redistribution in the cascading failure process. Moreover, the traffic load influence between nodes also plays a vital role in the robustness of the network. The proposed models and derived results can be utilized to improve the robustness of integrated urban public transport systems in traffic planning.

scholarly journals Cascading Failures and Vulnerability Evolution in Bus–Metro Complex Bilayer Networks under Rainstorm Weather Conditions

2019 ◽  
Vol 16 (3) ◽  
pp. 329 ◽  
Author(s):  
Fei Ma ◽  
Fei Liu ◽  
Kum Yuen ◽  
Polin Lai ◽  
Qipeng Sun ◽  
...  
Keyword(s):  
Public Transport ◽  
Coupling Strength ◽  
Failure Process ◽  
Transport Systems ◽  
Strength Analysis ◽  
Cascading Failure ◽  
Passenger Flow ◽  
Urban Public Transport ◽  
Passenger Volume ◽  
The Impact

In recent years, the frequent occurrence of rainstorms has seriously affected urban–public transport systems. In this study, we examined the impact of rainstorms on the vulnerability of urban–public transport systems consisting of both ground bus and metro systems, which was abstracted into an undirected weighted Bus–Metro complex bilayer network (Bus–Metro CBN) and the passenger volume was regarded as its weight. Through the changes in the node scale, network efficiency, and passenger volume in the maximal connected component of the Bus–Metro CBN, we constructed a vulnerability operator to quantitatively calculate the vulnerability of the Bus–Metro CBN. Then, the flow-based couple map lattices (CMLs) model was proposed to simulate cascading failure scenarios of the Bus–Metro CBN under rainstorm conditions, in which the rainstorm is introduced through a perturbation variable. The simulation results show that under the condition of passenger flow overload, the network may have a two-stage cascading failure process. The impact analysis shows that there is a rainstorm intensity threshold that causes the Bus–Metro CBN to collapse. Meanwhile, we obtained the optimal node and edge capacity through capacity analysis. In addition, our analysis implies that the vulnerability of the Bus–Metro CBN network in most scenarios is mainly caused by the degradation of network structure rather than the loss of passenger flow. The network coupling strength analysis results show that the node coupling strength has greater potential to reduce the vulnerability than edge coupling strength. This indicates that traffic managers should prioritize controlling the mutual influence between bus stops (or metro stations) to reduce the vulnerability of the Bus–Metro CBN more effectively.

scholarly journals MONITORING THE CONGESTION OF URBAN PUBLIC TRANSPORT SYSTEMS FOR THE POSSIBILITY OF INTRODUCING THE CROWD SHIPPING DELIVERY IN BRATISLAVA

2021 ◽  
Vol 8 (3) ◽  
pp. 277-285
Author(s):  
Andrii Galkin ◽  
Tibor Schlosser ◽  
Silvia Cápayová ◽  
Denis Kopytkov ◽  
Ganna Samchuk ◽  
...  
Keyword(s):  
Public Transport ◽  
Time Window ◽  
Study Data ◽  
Traffic Load ◽  
Transport Systems ◽  
Visual Methods ◽  
Passenger Transport ◽  
Urban Core ◽  
Urban Public Transport ◽  
The City

The aim is to study the congestion of urban passenger transport in the historical part of Bratislava for the possibility of introducing crowdsourcing technology. The visual methods of examination are used in work. According to the results of the study, data were obtained on the congestion of urban passenger transport and its distribution by hours of the day at the entrances to the historic part of the city. The obtained results indicate the possibility of using crowd shipping technology in off-peak periods. Monitoring of public transport flows in the urban core will identifying the distribution of travellers and contribute to understanding the time window for implementing crowd shipping technology during the day, minimal whit influence on the other participants of the transport process. The peak traffic load is observed on the routes passing through the Slovak National Rebellion (SNP) square in direct downtown of the city, from 8 am to 9 am and from 4-6 pm in the evening, and from 7 am to 8 am in the morning and 5-6 pm for the routes passing through the SNP bridge across the river Danube. A new way to monitoring the number of passengers in public transport was suggested. The paper provides credits for future development sharing technology and sustainable development of transport in Slovakia. The results could be usfull for transport policy and regularities for local government in Bratislava in case of apply new delivery technology.

scholarly journals Research on Assessment Methods for Urban Public Transport Development in China

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Linghong Zou ◽  
Hongna Dai ◽  
Enjian Yao ◽  
Tian Jiang ◽  
Hongwei Guo
Keyword(s):  
Public Transport ◽  
Fuzzy Ahp ◽  
Assessment Method ◽  
Urban Transport ◽  
Assessment System ◽  
Assessment Model ◽  
Sustainable Urban Development ◽  
Transport Systems ◽  
Urban Travel ◽  
Urban Public Transport

In recent years, with the rapid increase in urban population, the urban travel demands in Chinese cities have been increasing dramatically. As a result, developing comprehensive urban transport systems becomes an inevitable choice to meet the growing urban travel demands. In urban transport systems, public transport plays the leading role to promote sustainable urban development. This paper aims to establish an assessment index system for the development level of urban public transport consisting of a target layer, a criterion layer, and an index layer. Review on existing literature shows that methods used in evaluating urban public transport structure are dominantly qualitative. To overcome this shortcoming, fuzzy mathematics method is used for describing qualitative issues quantitatively, and AHP (analytic hierarchy process) is used to quantify expert’s subjective judgment. The assessment model is established based on the fuzzy AHP. The weight of each index is determined through the AHP and the degree of membership of each index through the fuzzy assessment method to obtain the fuzzy synthetic assessment matrix. Finally, a case study is conducted to verify the rationality and practicability of the assessment system and the proposed assessment method.

scholarly journals Modelling and Assessing Energy Performance of an Urban Transport System with Electric Drives

2013 ◽  
Vol 25 (5) ◽  
pp. 495-506 ◽  
Author(s):  
Ioan Felea ◽  
Istvan Csuzi ◽  
Eva Barla
Keyword(s):  
Sustainable Development ◽  
Energy Consumption ◽  
Transport System ◽  
Public Transport ◽  
Electric Energy ◽  
Electrical Energy ◽  
Energy Performance ◽  
Urban Transport ◽  
Transport Systems ◽  
Urban Public Transport

Energy conservation is one of the key priorities of sustainable development strategy. Transport systems are responsible for about one third of energy consumption. As result, the identification of solutions to reduce energy consumption in these systems is essential for the implementation of the sustainable development strategies. The present work is dedicated to identifying the possibilities for a reduction in the consumption of electric energy in electric urban public transport systems, using the audit of their electricity system. After justifying the importance of these concerns, a mathematical model of the electrical energy balance of the electric urban public transport system and its components is presented. The analysis is applied to determine the losses in the system components and useful energy, based on the evaluation and energy consumption measurements. The measurements to reduce energy losses are identified and characterized under technical and economic aspect, optimal electrical energy balances being done on this basis.

Low-emission vehicles in public transport - selected aspects

2019 ◽  
Vol 127 ◽  
pp. 59-68
Author(s):  
Dariusz Pyza ◽  
Monika Buczkowska ◽  
Marek Ziembicki
Keyword(s):  
Public Transport ◽  
Negative Impact ◽  
The State ◽  
Transport Policy ◽  
Urban Transport ◽  
Transport Systems ◽  
Low Emission ◽  
Urban Public Transport ◽  
Zero Emission

The European Union's transport policy assumes limiting the negative impact of transport on the environment. In this aspect, several actions are undertaken to achieve this goal. One of the priorities in this area is developing zero-emission transport systems in urban public transport. The article presents selected aspects of low-emission vehicles and their use in urban transport systems. Besides, the state of development of low-emission transport systems in public transport in Poland was presented, with particular emphasis on the system in the Warsaw agglomeration.

scholarly journals A Study on the Corridor of Urban Public Transport Systems in Japan

2005 ◽  
Vol 22 ◽  
pp. 643-650
Author(s):  
Tsutomu YABE ◽  
Fumihiko NAKAMURA ◽  
Toshiyuki OKAMURA
Keyword(s):  
Public Transport ◽  
Transport Systems ◽  
Urban Public Transport

scholarly journals Design of Regulatory Contracts – Example of the Urban Transport Industry

2016 ◽  
Vol 9 (13) ◽  
pp. 121-139
Author(s):  
Joanna Piechucka
Keyword(s):  
Public Transport ◽  
Urban Transportation ◽  
Urban Transport ◽  
Regulatory Capture ◽  
The European Union ◽  
Transportation Industry ◽  
Economic Literature ◽  
Transport Industry ◽  
Urban Public Transport ◽  
Selection Of

The present article discusses economic issues related to the design of optimal regulatory contracts on the example of the urban public transport industry. It highlights the importance of the design of efficient regulatory contracts in the context of changes facing the urban transportation industry in the European Union. Furthermore, it provides an overview of the main issues put forward in economic literature related to the design of regulatory contracts. It discusses several problems relevant in this context such as informational asymmetries, transaction costs, and regulatory capture. It also comments on a selection of views presented in economic literature dealing with these issues. Finally, the article presents the regulatory framework, contractual practices and characteristics of the French urban public transport industry. France is well known for its long standing tradition of contracting between the State and the private sector in transportation. The analysis of the French example may help to prove useful insights in this regard.

scholarly journals IMPROVING OF URBAN PUBLIC TRANSPORTATION QUALITY VIA OPERATOR SCHEDULE OPTIMIZATION

2019 ◽  
pp. 23-33
Author(s):  
Andrii Galkin ◽  
Yurii Davidich ◽  
Yevhen Kush ◽  
Nataliia Davidich ◽  
Iryna Tkachenko
Keyword(s):  
Public Transportation ◽  
Activity Index ◽  
Idle Time ◽  
Urban Transport ◽  
Transport Systems ◽  
Standing Time ◽  
Schedule Optimization ◽  
Regulatory Systems ◽  
Urban Public Transport

The functioning of passenger transport systems should provide necessary quality of passenger service. The results of this research have shown possibility to increase the quality of urban public transport via influence on the driver’s state due to the rational schedule planning. The state change patterns of drivers during the idle time on the final and intermediate bus stops were formalized, based on field observations. The following conclusion was made: decreasing of driver’s body stress takes place during the idle time on the route stops. The intensity of decreasing of driver’s body stress is inversely proportional to the meaning of activity index of driver’s regulatory systems before the start of standing time. Consequently, the duration of idle time must be differentiated depending on the value of the indicator of activity of driver’s regulatory systems before the start of standing time, which is influenced by the working conditions. ECG method was used for assessing driver’s fatigue in elements of transportation process. Comparative analysis of driver’s state changes during the different types of idle time shows the comparability of the results of the study. Transportation management experts can use the research results in urban transport schedule planning and monitoring.

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