scholarly journals Modeling the Public Transport Networks: A Study of Their Efficiency

Complexity ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Mary Luz Mouronte-López
Keyword(s):  
Public Transportation ◽  
Probability Distributions ◽  
Transportation Network ◽  
Characteristic Curve ◽  
Similarity Measures ◽  
Centrality Measures ◽  
Cumulative Probability ◽  
Eigenvector Centrality ◽  
The Public ◽  
The Impact

The public transportation network (PTN) provides mobility and access to community resources, employment, medical care, infrastructures, and other resources in the city. This research studies the process of the formation of links among nodes in different real-world PTNs. We have found that this process may be appropriately explained by a generalized linear model (GLM) using local, global, and quasilocal similarity indexes as explanatory variables. In modeling, the response variable was described by a binomial probability density function, and the logit function was used as a link function. In the crossvalidation process, utilising a downsampling approach, both average accuracy and area under the receiver operating characteristic curve (AUC) metrics presented higher values than 0.99. The kappa parameter had magnitudes larger than 0.93 for most of the PTNs. In the final validation stage, recall and specificity metrics took the value 1. Accuracy and precision parameters were larger than 0.99 and 0.87, respectively, for the majority of PTNs. Only one of the PTNs required utilising a smoothed bootstrap approach in order to achieve better results. The similarity measures with the greatest influence on the model were determined. We also assessed the impact of link removal on the global efficiency of PTNs, considering several similarity indexes. Additionally, we find that most of the networks show low local and global efficiencies (≤0.20), as well as travel times with a relevant variability, exhibiting standard deviations larger than 790 seconds. Significant similarities exist between the cumulative probability distributions of the local efficiency in all PTNs. With respect to the centrality measures, the eigenvector centrality presented a strong correlation with the hub/authority centralities (>0.80), while the pagerank showed a moderate, high, or very high correlation with the degree in all PTNs, >0.50.

KVMRT Challenges – Elevated Viaducts and Station Structures

2018 ◽  
Author(s):  
ChongLing Wong
Keyword(s):  
Public Transportation ◽  
Transportation Network ◽  
Economic Trend ◽  
Capital City ◽  
Project Delivery ◽  
Rail Transit ◽  
Kuala Lumpur ◽  
Transit System ◽  
The Public ◽  
Klang Valley

<p>Malaysia’s capital city Kuala Lumpur has been experiencing urbanization growth spurts in the last two decades, in tandem with her rapid economic expansion and progress towards a developed nation. Trailing this economic trend is the need to improve and expand public transportation, particularly in the railway sector. The Klang Valley Mass Rapid Transit (KVMRT) rail transit system was conceived to meet that need and complement the existing public transportation network.</p><p>The first KVMRT metro line commonly known as the SBK line which connects Sg Buloh township in the northern-west and Kajang in the southern-east, was delivered and fully opened to the public ahead of schedule on 17 July 2017. The success of the project was achieved through significant efforts in surmounting many challenges in different aspects. This paper shares the experiences from the perspective of the Project Delivery Partner (PDP) in the planning, design and construction of the viaducts and station structures.</p>

scholarly journals Cairo Public Transport Route Finder – A Pilot System

2016 ◽  
Vol 4 (4) ◽  
pp. 26
Author(s):  
Khaled Ahmed Ahmed Mohamed Hassan ◽  
Ghada Nasr Hassan
Keyword(s):  
Shortest Path ◽  
Public Transport ◽  
Public Transportation ◽  
Transportation Network ◽  
Android Application ◽  
Network Graph ◽  
The Public ◽  
Shortest Route ◽  
Greater Cairo ◽  
Starting Location

Aiming to facilitate the choice of transport links leading from a starting location to a destination in greater Cairo, we propose in this work a public transportation mobile (android) application to assist users of public transport. The system is a pilot application that considers the public mini-buses network in three areas of Cairo, and builds the database of the mini-bus network verified on the ground. From this database, the transportation network graph consisting of nodes and possible links between them is constructed. Upon request, the system then identifies the series of public transport possible, calculates the shortest path between the two chosen locations, and displays the bus, or series of buses, and the routes to the user, ordered by distance. The specialized algorithm Dijkstra was implemented to find the shortest route.

scholarly journals BUCHAREST PUBLIC TRANSPORT: CHALLENGES DURING THE COVID-19 PANDEMIC

2021 ◽  
Vol 11 (S.I.2) ◽  
Author(s):  
Andreea Daniela TUDOR
Keyword(s):  
Public Transport ◽  
Public Transportation ◽  
Transport Sector ◽  
Research Database ◽  
Safety Measures ◽  
The Public ◽  
The People ◽  
To Come ◽  
Main Barrier ◽  
The Impact

The COVID-19 pandemic had and it’s still having a big impact on mobility since the end of 2018, when it started. Public transportation was already facing issues in all the big metropolitan cities where many people are in the same space at the same time. If we add the COVID-19 consequences and rules, public transit is the main barrier for community members to go back to their daily routines being safe and comfortable. This paper presents the changes in the public transport sector since COVID-19 started and aims to explore the consequences and possible alternatives to mitigate the impact of the pandemic crisis. As research method I decided to analyze and summarize numerous primary sources along with the public transport operators’ official websites. Both quantitative and qualitative data were used by doing a comprehensive research in ProQuest Central, Coronavirus Research Database, Elsevier ScienceDirect and Web of Science. The results suggest that reduction of mobility has been the first measure to slow the growth of the worldwide COVID-19 cases. However, the transport limitations don’t have the same impact for all modes of transport, public transport having one of the most considerable decline so far. In Bucharest, the public transport operators have imposed safety measures such as mask wearing, periodic cleaning, transparency and access to the information. Those aspects are important, but sometimes not sufficient to fight against the pandemic. What this research does is to come and complete the set of safety measures focusing on mitigating the spread of the SARS-CoV-2 virus and increase the safety of the people while using public transport vehicles.

Measures and metrics

2018 ◽  
Author(s):  
Mark Newman
Keyword(s):  
Network Structure ◽  
Similarity Measures ◽  
Clustering Coefficient ◽  
Centrality Measures ◽  
Degree Centrality ◽  
Eigenvector Centrality ◽  
Structural Balance ◽  
Important Nodes

This chapter describes the measures and metrics that are used to quantify network structure. The chapter starts with a discussion of centrality measures, which are used to identify central or important nodes in networks. Measures discussed include degree centrality, eigenvector centrality, PageRank, closeness, and betweenness. This is followed by a discussion of groupings of nodes like cliques and components, transitivity measures including the clustering coefficient, structural balance in networks, similarity measures, and assortative mixing.

scholarly journals A comparative study of Transit Oriented Development (TOD) at Yogyakarta Railway Station

2018 ◽  
Vol 181 ◽  
pp. 02001
Author(s):  
Okkie Putriani ◽  
Ibnu Fauzi
Keyword(s):  
Land Use ◽  
Public Transport ◽  
Public Transportation ◽  
Transit Oriented Development ◽  
Railway Station ◽  
The Public ◽  
Bus Stop ◽  
Alternative Location ◽  
Bus Stops ◽  
The Impact

Optimizing the public transport and synergizing the land use can reduce the impact of urban development by attracting the development around the transit station. This situation encourages the accessibility of public transportation by creating conditions between passenger expectations realted to the concept Transit Oriented Development (TOD) between land use, mobility, and environment. This study was conducted by TOD with the area located in the center of local wisdom by cultural city, Yogyakarta Railway Station. The purpose of this study is to provide an alternative location where bus stops or Trans Jogja shelters are more easily accessible by users of rail services and facilitate the model’s transfer. The method of this research is descriptive quantitative. It explains the trans it function, needs and condition of Trans Jogja as the existing public transport and the accessibility of the bus stops. The conclusion is the recommendation for the bus stop location can be relocate near the dropout East and South area of the Railway Station

Map-Matching Algorithm for Applications in Multimodal Transportation Network Modeling

2015 ◽  
Vol 2537 (1) ◽  
pp. 62-70 ◽  
Author(s):  
Kenneth Perrine ◽  
Alireza Khani ◽  
Natalia Ruiz-Juri
Keyword(s):  
Public Transportation ◽  
Transportation Network ◽  
Data Representation ◽  
Transportation Systems ◽  
Data Sets ◽  
The Public ◽  
Standard Data ◽  
Planning Models ◽  
Transit Agencies ◽  
Public Transportation Systems

Generalized Transit Feed Specification (GTFS) files have gained wide acceptance by transit agencies, which now provide them for most major metropolitan areas. The public availability GTFSs combined with the convenience of presenting a standard data representation has promoted the development of numerous applications for their use. Whereas most of these tools are focused on the analysis and utilization of public transportation systems, GTFS data sets are also extremely relevant for the development of multimodal planning models. The use of GTFS data for integrated modeling requires creating a graph of the public transportation network that is consistent with the roadway network. The former is not trivial, given limitations of networks often used for regional planning models and the complexity of the roadway system. A proposed open-source algorithm matches GTFS geographic information to existing planning networks and is also relevant for real-time in-field applications. The methodology is based on maintaining a set of candidate paths connecting successive geographic points. Examples of implementations using traditional planning networks and a network built from crowdsourced OpenStreetMap data are presented. The versatility of the methodology is also demonstrated by using it for matching GPS points from a navigation system. Experimental results suggest that this approach is highly successful even when the underlying roadway network is not complete. The proposed methodology is a promising step toward using novel and inexpensive data sources to facilitate and eventually transform the way that transportation models are built and validated.

Economical Effects of Using Subway in the Reduction of Fuel Consumption

2011 ◽  
Vol 90-93 ◽  
pp. 817-824
Author(s):  
Ebrahim Safa ◽  
Arman Safa
Keyword(s):  
Air Pollution ◽  
Fuel Consumption ◽  
Public Transportation ◽  
Motor Vehicle ◽  
Transportation Network ◽  
Environmental Costs ◽  
Islamic Republic ◽  
The Public ◽  
Economic Problems ◽  
Islamic Republic Of Iran

Abstract .Transportations one of the important indexes of air pollution in cities has always occurred in the form of a big Unavoidable problem. Lack of comprehensive approach and enough (Sufficient) attention toward transportation and traffic issues have unsparing social, economical and environmental costs and damages in the country which the most important of them are: high fuel consumption and growth of the fatal and injury crashes, air pollution and environmental damages. Among the public transportation networks, railway public transit is known as the healthiest, fastest, safest and generally the most efficient transportation network which is proved the undeniable role in solving economic, social and environmental problems caused by public transport and traffic problems. Considering the political and economic centrality of Tehran as capital of Islamic Republic of Iran with an increasing population of over 10 million people, and the construction of satellite cities, and conducting population to these cities, it is important to construct several connecting subway lines for these satellite cities. This paper focuses on economic problems via comparing underground subway as public vehicle with motor vehicle.

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