| 1. |
- Davidsson, Paul, et al.
(författare)
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The Fourth Wave of Digitalization and Public Transport : Opportunities and Challenges
- 2016
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Ingår i: Sustainability. - : MDPI. - 2071-1050. ; 8:12
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Tidskriftsartikel (refereegranskat)abstract
- We investigate the opportunities and challenges of the forth wave of digitalization, also referred to as the Internet of Things (IoT), with respect to public transport and how it can support sustainable development of society. Environmental, economical, and social perspectives are considered through analysis of the existing literature and explorative studies. We conclude that there are great opportunities for both transport operators and planners, as well as for the travelers. We describe and analyze a number of concrete opportunities for each of these actors. However, in order to realize these opportunities, there are also a number of challenges that needs to be addressed. There are both technical challenges, such as data collection issues, interoperability, scalability and information security, and non-technical challenges such as business models, usability, privacy issues, and deployment.
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| 2. |
- Hajinasab, Banafsheh
(författare)
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A Dynamic Approach to Multi-Agent-Based Simulation in Urban Transportation Planning
- 2018
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Reviewing previous studies on using computational models for analyzing the effect of transport policies on transportation systems shows that agentbased models have not been used much in spite of their great potential for simulating dynamic aspects of policy instruments and travel behavior. The main reason can be the need for a lot of input data which is hard to prepare for the modeler. This has led to limited use of agent-based models in previous studies and even in those studies the scope of simulation is limited to only particular scenarios. In this thesis, I proposed a general-purpose agent-based simulation model for urban transportation that supports simulation of a wide range of policy instruments. The proposed model is designed in a way that a large part of the input data can be generated automatically using online web-services. The thesis also reports an empirical study on using our proposed generalpurpose model together with on-line travel planners in agent-based simulation for predicting the effect of different policy instruments on travel behavior. The results from our empirical study showed that our generalpurpose agent-based model predicts 72% of the real travel decisions correctly. Furthermore, the results of the simulation for various scenarios and combination of them seem to be acceptable. Finally, we found out that the use of on-line services for data collection increases the speed and flexibility of the system for defining and running new scenarios. However, the scalability of using on-line services in simulation is constrained by limitations of online service providers. The main contributions of this thesis are a general-purpose agentbased simulation model for urban transportation and a novel approach to automatically generate input data to the simulation using online travel planners and other web-services. This novel approach mitigates the challenge of agent-based simulation as a data-intensive method. This can lead to more widespread use for agent-based simulation in solving complex and realistic transportation scenarios. Another contribution of this thesis is on visualization of simulation output. One of the main challenges of using simulation systems by transport planners and decision makers as end-users is to understand the complex output of the simulation. In this thesis, I empirically demonstrated how the usability of a freight transport simulation system is improved by adding a visualization module that illustrates the results of the simulation for the end-users.
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| 3. |
- Hajinasab, Banafsheh, et al.
(författare)
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A survey on the use of computational models for ex ante analysis of urban transport policy instruments
- 2014
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Ingår i: Procedia Computer Science. - : Elsevier. - 1877-0509. ; :32, s. 348-355
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Tidskriftsartikel (refereegranskat)abstract
- This paper provides an analysis of the use of computational models for predicting the effects of different policy instruments on urban transport systems. We define a framework for describing and comparing current approaches that takes into account (i) what policy instruments are studied, (ii) what type of effects are predicted, (iii) which factors are modeled, (iv) the type of model used, and (v) what data sources are used. The main conclusions of the analysis are: (i) despite the recognized potential of agent-based modeling to study behavioural change of a population, it rarely has been used for ex-ante analysis of policy instruments using real-world data, (ii) some factors that influence travellers’ decisions, such as comfort and departure time, have not been considered much in the modeling, (iii) ex-ante analysis of economic instruments constitute the majority of studies, but informative instruments have been recently considered due to the increasing use of information technology in transportation.
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| 4. |
- Hajinasab, Banafsheh, et al.
(författare)
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A visualization toolkit for transportation simulation systems
- 2012
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Ingår i: NordiCHI '12: Proceedings of the 7th Nordic Conference on Human-Computer Interaction: Making Sense Through Design. - New York, NY, USA : ACM Digital Library. ; , s. 793-794
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Konferensbidrag (refereegranskat)abstract
- In this work, we investigate how visualization techniques could address the challenges of transportation simulation data analysis in order to facilitate the decision-making process for transportation simulation users. For this purpose, we have applied the visualization methods in a real implemented agent-based transportation simulator called TAPAS as a case. We have analyzed the visualization related requirements of users using a user-centric approach and an interactive visualization toolkit has been designed and developed based on the identified requirements. This paper presents a description of the visualization toolkit which will be used to investigate how the actors in a transport chain are expected to act when different types of governmental control policies are applied, such as, fuel taxes, road tolls, vehicle taxes and requirements on vehicles.
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| 5. |
- Hajinasab, Banafsheh, et al.
(författare)
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On the use of on-line services in transport simulation
- 2017
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Ingår i: Transportation Research Procedia. - : Elsevier. - 2352-1465. ; 21, s. 208-215
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, we introduce a new approach for collecting data for transport simulation models that is using on-line services in order to outsource parts of the modeling and computation of simulation models. We describe our approach of using on-line services as part of a simulation model and we present our experiences of applying the approach to a case study using the ASIMUT model, where the travelers between two neighbour cities in Southern Sweden are modeled. The results from our case study shows that the use of on-line services for data collection in transport simulation can bring advantages to the simulation model, for example, in terms of reduced needs for modeling of the transport system as well as computation inside the simulation model and improved access to the most recent information. We also noticed some limitations, such as the inability to access to information regarding the future such as timetables and no control over data provided by third-party services. However, we argue that there are solutions for each of the identified limitations, and therefore we believe that the suggested approach might provide a unique opportunity for future transportation simulation models.
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| 6. |
- Hajinasab, Banafsheh, et al.
(författare)
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Towards an agent-based model of passenger transportation
- 2015
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Ingår i: Multi-Agent-Based Simulation;XVI. - Cham : Springer. ; , s. 132-145
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Konferensbidrag (refereegranskat)abstract
- An agent-based simulation model for supporting the decision making in urban transport planning is presented. The model can be used to investigate how different transport infrastructure investments and policy instruments will affect the travel choices of passengers. We identified four main categories of factors influencing the choice of travel: cost, time, convenience, and social norm. However, travelers value these factors differently depending on their in-dividual characteristics, such as age, income, work flexibility and environmen-tal engagement, as well as on external factors, such as the weather. Moreover, instead of modeling the transport system explicitly, online web services are used to generate travel options. The model can support transport planners by providing estimations of modal share, as well as economical and environmental consequences. As a first step towards validation of the model, we have con-ducted a simple case study of three scenarios where we analyze the effects of changes to the public transport fares on commuters’ travel choices in the Malmö-Lund region in Sweden.
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| 7. |
- Hajinasab, Banafsheh, et al.
(författare)
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Visualization of data from transportation simulation systems
- 2013
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Konferensbidrag (refereegranskat)abstract
- Information visualization, as a way of presenting different data types in an understandable form, has the potential to support the analysis of transportation data. Visualization can often help decision makers to efficiently analyse large amount of information. One application area of information visualization is to support the analysis of the transportation data and thus facilitate the decision-making process. Most of the previous studies in this area have focused on visualization of transportation infrastructures such as roads, bridges in order to enhance the public awareness regarding upcoming projects which makes it easier to reach a consensus on the high-level decisions. However, the main focus of this article is on methods for visualization of data generated by transportation simulation systems to support analysis of the consequences of applying different transport policy measures, such as the introduction of road user charging or investment in new infrastructure. In this work, we investigate how visualization techniques could address the challenges of transportation simulation data analysis in order to facilitate the decision-making process. For this purpose, we have applied the visualization methods to a real implemented agent-based transportation simulator called TAPAS. In this case study, we have analysed the visualization related requirements of users using a user-centric approach and the visualization tool has been designed and developed based on the identified requirements.
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| 8. |
- Shao, Deo, et al.
(författare)
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M-Health : A Mobile Data Collection Prototype for Monitoring and Evaluation of Public Health Service in the Developing World
- 2012
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Ingår i: Journal of Informatics and virtual education. - : University of Dodoma, College of Informatics and Virtual Education, Tanzania. - 1821-7087. ; 2:1, s. 43-50
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Tidskriftsartikel (refereegranskat)abstract
- The rapidly growing use of mobile technologies has increased pressure on the demand for mobile-based data collection solutions to bridge the information gaps in the public health sector. In this paper, a prototype for mobile health data collection (MHDK) is proposed. MHDK is built based on open source data collection frameworks. The proposed prototype offers ways of collecting health data through mobile phones and visualizes the collected data in a web application. The evaluation of the prototype seems to show the feasibility of mobile technologies, particularly open source technologies, in improving the health data collection and reporting systems for the developing world. The use of cellular phones for public health service monitoring and evaluation is therefore one of the most promising developments in the quest to achieve improved public health services.
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