Advancing from Efficiency to Sustainability in Swedish Medium-sized Cities: An Approach for Recommending Powertrains and Energy Carriers for Public Bus Transport Systems

Passengers’ boarding times at bus stops have a great importance to calculate dwell and travel time for scheduling process in public transport operations. However, there are not so much observed boarding times data in the actual bus transport systems and it may cause some prediction problems in scheduling process of public transport operations. For this reason, accurate estimation of the boarding times will ensure correct calculation of dwell and total travel time for bus transport systems. Based on this idea, this study aims to model boarding times of each passengers by evaluating different parameters using two different (statistical and optimization analysis) methods. For this purpose, a comprehensive data collection process was conducted in total seven different cities of Turkey based upon their population. Two new models were developed for boarding time estimation by evaluating various parameters using a multiple Ordinary Least Square (OLS) regression and Artificial Bee Colony (ABC) algorithm as statistical and optimization methods, respectively. Study results showed that modeling of boarding times by considering various parameters is an effective strategy to improve the performance of bus transport systems by using developed two models

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Applying the LOT Methodology to a Public Bus Transport Ontology aligned with Transmodel: Challenges and Results

Semantic Web ◽

10.3233/sw-210451 ◽

2021 ◽

pp. 1-19

Author(s):

Edna Ruckhaus ◽

Adolfo Anton-Bravo ◽

Mario Scrocca ◽

Oscar Corcho

Keyword(s):

Design Patterns ◽

Reference Model ◽

Data Driven ◽

Transport Systems ◽

Ontology Design ◽

Rdf Data ◽

Mapping Language ◽

Uml Specification ◽

Validation Stage ◽

Bus Transport

We present an ontology that describes the domain of Public Transport by bus, which is common in cities around the world. This ontology is aligned to Transmodel, a reference model which is available as a UML specification and which was developed to foster interoperability of data about transport systems across Europe. The alignment with this non-ontological resource required the adaptation of the Linked Open Terms (LOT) methodology, which has been used by our team as the methodological framework for the development of many ontologies used for the publication of open city data. The ontology is structured into three main modules: (1) agencies, operators and the lines that they manage, (2) lines, routes, stops and journey patterns, and (3) planned vehicle journeys with their timetables and service calendars. Besides reusing Transmodel concepts, the ontology also reuses common ontology design patterns from GeoSPARQL and the SOSA ontology. As part of the LOT data-driven validation stage, RDF data has been generated taking as input the GTFS feeds (General Transit Feed Specification) provided by the Madrid public bus transport provider (EMT). Mapping rules from structured data sources to RDF were developed using the RDF Mapping Language (RML) to generate RDF data, and queries corresponding to competency questions were tested.

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STATISTICAL PROPERTIES OF URBAN GROUND BUS-TRANSPORT NETWORKS FROM SELF-AVOIDING RANDOM WALKS

Modern Physics Letters B ◽

10.1142/s0217984907013572 ◽

2007 ◽

Vol 21 (16) ◽

pp. 1027-1040 ◽

Cited By ~ 5

Author(s):

YONG-ZHOU CHEN ◽

NAN LI

Keyword(s):

Random Walks ◽

Topological Structure ◽

Empirical Investigation ◽

Real Life ◽

Statistical Properties ◽

Transport Systems ◽

Transport Networks ◽

Simulation Research ◽

Urban Bus ◽

Bus Transport

We conjecture that the evolution process with self-avoiding random walks is the origin for the properties of urban ground bus-transport networks (BTN). In order to verify our conjecture, a toy model, which simulates the growth of urban bus-transport systems, is proposed after empirical investigation on the BTNs of four major cities in China. In current empirical and simulation research, our method combining weight and geographical topology of the BTN together allows us to study the coupling relations among the BTN's weighted quantities and underlying topological structure. Finally, the simulating results reveal that the model can reproduce most phenomena observed in real-life urban ground BTNs.

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Dynamical Modeling and Predictive Control of Bus Transport Systems: A Hybrid Systems Approach

IFAC-PapersOnLine ◽

10.1016/j.ifacol.2017.08.1067 ◽

2017 ◽

Vol 50 (1) ◽

pp. 7499-7504 ◽

Cited By ~ 4

Author(s):

I.I. Sirmatel ◽

N. Geroliminis

Keyword(s):

Hybrid Systems ◽

Predictive Control ◽

Systems Approach ◽

Transport Systems ◽

Dynamical Modeling ◽

Bus Transport

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Method of modelling operation and maintenance processes in public transport systems using a certain class of stochastic processes

MATEC Web of Conferences ◽

10.1051/matecconf/202133201005 ◽

2021 ◽

Vol 332 ◽

pp. 01005

Author(s):

Bogdan Landowski

Keyword(s):

Stochastic Process ◽

Transport System ◽

Public Transport ◽

Experimental Tests ◽

Transport Systems ◽

Homogeneous Markov Process ◽

City Bus ◽

Operation And Maintenance ◽

Finite Set ◽

Bus Transport

The study presents a method for application of the theory Markov homogenous processes for modeling of the process of vehicle operational state changes characterized by exponential distribution of their duration time. A model of operation and maintenance of vehicles used in the research object has been developed. The research object is a city bus transport system situated in the analyzed agglomeration. Stochastic process {X(t), t = 0} is a mathematical model of the process of operation and maintenance of public transport buses. The analyzed stochastic process {X(t),t = 0} has a finite phase space S, S={S1, S2, ..., Sn}. It was assumed that operation of the model is to be described by the homogeneous Markov process {X(t) : t ? R+} with a finite set of S states. The states of the analyzed stochastic process correspond to the operational states distinguished for a bus. A hypothetical computing model was built in order to illustrate the discussion and present a method for application of the developed model. The parameters of the model were estimated based on the analysis of initial results of experimental tests conducted in a real bus transport system.

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