Vol 13 No 2 (2013)
2013-04-01
Vol 13 No 2 (2013)
2013-04-01
Articles
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In recent years, a model was developed describing effects of Intelligent Transport Systems (ITS) on location preferences of office-keeping organisations in urbanised. The model is based on a Hierarchical Information Integration Approach, using Stated Preference data. The model indicates that ITS significantly contribute to office location preferences. This article presents an analysis of the predictive validity of that model. Office keeping organisations in two mediumsized Dutch cities (Nijmegen and Arnhem) were asked to evaluate existing office locations assuming different ITS scenarios. The analyses show that the model systematically underestimates the attractiveness of office locations. However, the part worth utility scores, describing the contribution of ITS to location preferences, appeared to be good estimators of the added value of ITS. Moreover, the ranking position that responding organisations give to the office locations in their cities is estimated properly by the model.
In recent years, a model was developed describing effects of Intelligent Transport Systems (ITS) on location preferences of office-keeping organisations in urbanised. The model is based on a Hierarchical Information Integration Approach, using Stated Preference data. The model indicates that ITS significantly contribute to office location preferences. This article presents an analysis of the predictive validity of that model. Office keeping organisations in two mediumsized Dutch cities (Nijmegen and Arnhem) were asked to evaluate existing office locations assuming different ITS scenarios. The analyses show that the model systematically underestimates the attractiveness of office locations. However, the part worth utility scores, describing the contribution of ITS to location preferences, appeared to be good estimators of the added value of ITS. Moreover, the ranking position that responding organisations give to the office locations in their cities is estimated properly by the...
In recent years, a model was developed describing effects of Intelligent Transport Systems (ITS) on location preferences of office-keeping organisations in urbanised. The model is based on a Hierarchical Information Integration Approach, using Stated Preference data. The model indicates that...
Raffael Argiolu, Rob van der Heijden, Ilona Bos, Vincent Marchau -
This paper aims to geographically differentiate the road accident costs associated with living at a certain place of residence. Official accident data in Germany record the place the accident occurred, but not the casualties' places of residence. Among those involved in an accident at a certain place there may obviously be some non-residents. Hence spatial analysis based on place of accident may not be suitable for drawing conclusions about specific cost (or risk) figures for people living in certain places. People’s risk of encountering an accident in areas other than that where they live may vary with their mobility. We provide an extensive literature review of geographical accident analysis both for place of accident-based and place of residence-based approaches, including the question to what extent accident related analyses can be used to estimate residential related risks. Subsequently we report on a residence-based case study for the German state of North Rhine-Westphalia where we study per capita accident cost figures on the district level. We also examine impact factors of accident cost levels using structural equation modelling. The results show that the cost figures are considerably lower for urban residents than for suburban and rural dwellers. For children the picture is more mixed.
This paper aims to geographically differentiate the road accident costs associated with living at a certain place of residence. Official accident data in Germany record the place the accident occurred, but not the casualties' places of residence. Among those involved in an accident at a certain place there may obviously be some non-residents. Hence spatial analysis based on place of accident may not be suitable for drawing conclusions about specific cost (or risk) figures for people living in certain places. People’s risk of encountering an accident in areas other than that where they live may vary with their mobility. We provide an extensive literature review of geographical accident analysis both for place of accident-based and place of residence-based approaches, including the question to what extent accident related analyses can be used to estimate residential related risks. Subsequently we report on a residence-based case study for the German state of North...
This paper aims to geographically differentiate the road accident costs associated with living at a certain place of residence. Official accident data in Germany record the place the accident occurred, but not the casualties' places of residence. Among those involved in an accident at a...
Christian Holz-Rau, Joachim Scheiner -
The paper provides analytical evidence of the added-value of flexibility for air transportation systems. More specifically, the impact of a new innovative modular aircraft on the operations of an airline is deeply analyzed. The impact analysis is carried out with an integrated schedule planning model which presents a combination of appropriate optimization and behavioral modeling methodologies. The results show that the flexible system uses the transportation capacity more efficiently by carrying more passengers with less overall capacity. Moreover, it is observed that the flexible system deals better with insufficient transportation capacity. Furthermore, the scheduling decisions are robust to the estimated cost figures of the new system. For the analyzed range of costs, it is always carrying more passengers with less allocated capacity compared to a standard system.
The paper provides analytical evidence of the added-value of flexibility for air transportation systems. More specifically, the impact of a new innovative modular aircraft on the operations of an airline is deeply analyzed. The impact analysis is carried out with an integrated schedule planning model which presents a combination of appropriate optimization and behavioral modeling methodologies. The results show that the flexible system uses the transportation capacity more efficiently by carrying more passengers with less overall capacity. Moreover, it is observed that the flexible system deals better with insufficient transportation capacity. Furthermore, the scheduling decisions are robust to the estimated cost figures of the new system. For the analyzed range of costs, it is always carrying more passengers with less allocated capacity compared to a standard system.
The paper provides analytical evidence of the added-value of flexibility for air transportation systems. More specifically, the impact of a new innovative modular aircraft on the operations of an airline is deeply analyzed. The impact analysis is carried out with an integrated schedule...
Bilge Atasoy, Matteo Salani, Michel Bierlaire, Claudio Leonardi -
We consider the application of reference-dependent consumer choice theory to traffic assignment on transportation networks. Route choice is modelled based on random utility maximisation with systematic utility embodying loss aversion for the travel time and money expenditure attributes. Stochastic user equilibrium models found in the literature have considered exogenously given reference points. The paper proposes a model where reference points are determined consistently with the equilibrium flows and travel times. The referencedependent stochastic user equilibrium (RDSUE) is defined as the condition where (i) no user can improve her utility by unilaterally changing path, (ii) each user has as reference point the current travel time and the money expenditure of one of the available paths, and (iii) if each user updates the reference point to her current path the observed path flows do not change. These conditions are formally equivalent to a multi-class stochastic equilibrium where each class is associated with a path and has as reference point the current state on the path, and the number of users in each class equals the current flow on the path. The RDSUE is formulated as a fixed point problem in the path flows. Existence of RDSUE is guaranteed under usual assumptions. A heuristic algorithm based on the method of successive averages is proposed to solve the problem. The model is illustrated by two numerical examples, one relates to a two-link network and another to the Nguyen-Dupuit network. A reference-dependent route choice model calibrated on stated preference data is used. The second example serves also to demonstrate the algorithm. The impact on the equilibrium of different assumptions on the degree of loss aversion with respect to the travel time attribute are investigated.
We consider the application of reference-dependent consumer choice theory to traffic assignment on transportation networks. Route choice is modelled based on random utility maximisation with systematic utility embodying loss aversion for the travel time and money expenditure attributes. Stochastic user equilibrium models found in the literature have considered exogenously given reference points. The paper proposes a model where reference points are determined consistently with the equilibrium flows and travel times. The referencedependent stochastic user equilibrium (RDSUE) is defined as the condition where (i) no user can improve her utility by unilaterally changing path, (ii) each user has as reference point the current travel time and the money expenditure of one of the available paths, and (iii) if each user updates the reference point to her current path the observed path flows do not change. These conditions are formally equivalent to a multi-class stochastic equilibrium...
We consider the application of reference-dependent consumer choice theory to traffic assignment on transportation networks. Route choice is modelled based on random utility maximisation with systematic utility embodying loss aversion for the travel time and money expenditure attributes....
Paolo Delle Site, Francesco Filippi, Claudia Castaldi