scholarly journals MODELLING PERCEIVED QUALITY FOR URBAN TRANSPORT SYSTEMS USING WEIGHTED VARIABLES AND RANDOM PARAMETERS

2016 ◽  
Author(s):  
Eneko Echaniz Beneitez ◽  
Luigi Dell'Olio ◽  
Angel Ibeas Portilla
Keyword(s):  
Logit Model ◽  
Urban Transport ◽  
Model Fit ◽  
The Other ◽  
Transport Systems ◽  
Generic Model ◽  
Random Parameters ◽  
Ordered Logit Model ◽  
New Models ◽  
Complexity Increase

In this article, an Ordered Logit model is proposed considering systematic and random variations in tastes. The methodology followed for the creation of this model consisted, in first place, in obtaining data using a revelled preferences survey. In the survey, each user had to evaluate, following a qualitative scale, each one of the attributes of the analysed transport system. The variables evaluated in the survey had been grouped into six groups, and for each group, users had to order the attributes belonging to the group, using a ranking based method, from the most important to de least important, and, in the same way, with the groups itself. Once the database is formed, a generic model have been created, establishing this model as a comparative base for the rest. Next, two more models have been estimated one considering systematic users variations and the other one combining the systematic variations with weighted variables. Additionally, three new models have been calculated as an evolution of the previous ones using random variables as representation of systematic and random variations in user’s tastes. The results shows that as model’s complexity increase, an improvement in model fit is achieved.DOI: http://dx.doi.org/10.4995/CIT2016.2016.4072

scholarly journals Conditions of Environmental Degradation in Brazilian Countryside Areas

2020 ◽  
Vol 8 (3) ◽  
pp. 397
Author(s):  
Francisco José Silva Tabosa ◽  
Jair Andrade Araújo ◽  
Arthur Pereira Sales
Keyword(s):  
Economic Growth ◽  
Environmental Degradation ◽  
Logit Model ◽  
National Sample ◽  
The Other ◽  
Sample Survey ◽  
Access To Education ◽  
Ordered Logit Model ◽  
The North ◽  
The Relationship

This study aims to analyze the relationship between environmental degradation and economic growth in Brazil’s countryside areas and describe the situation of countryside households in relation to environmental pollution. For this, we used the microdata from the National Sample Survey (PNAD, Brazil) for the year 2015 and the econometric analysis occurred through the ordered logit model. The results allowed us to conclude that the Northeast, followed by the North and the Midwest, are the regions in which households are most inadequate; on the other hand, the South-Southeast axis presents the households with the best sustainable conditions. By analyzing the relationship between environmental degradation and economic growth for the Brazilian countryside environment, it was concluded that economic growth presented the inverted “N” format in relation to degradation for all regions, in which income and dimensions of access to education, health and information were crucial to this achievement.

Application of Cross-Nested Logit Model to Mode Choice in Tel Aviv, Israel, Metropolitan Area

1997 ◽  
Vol 1607 (1) ◽  
pp. 6-15 ◽  
Author(s):  
Peter Vovsha
Keyword(s):  
Logit Model ◽  
Mode Choice ◽  
Choice Models ◽  
Urban Transport ◽  
Transport Systems ◽  
Light Rail ◽  
Nested Logit ◽  
Nested Logit Model ◽  
Proposed Model ◽  
The Cross

Currently, modal split modeling is done mainly by means of disaggregated mode choice models. The almost absolute dominance of multinomial and nested logit models over other mode choice models among applied transportation modelers is attributable to their theoretical soundness, to their simple and understandable analytical structure, and to the calibration procedures that have been developed. Typical urban transport systems, however, are characterized by a variety of modes including private (automobile), public transit (bus, suburban rail, light rail, and subway), and various combinations of these. Analysis reveals that the nested logit model based on the assumption of groupwise similarities among modes is not a suitable modeling tool in such situations. A cross-nested model that is derived from the generalized extreme value class and that can be thought of as a generalization of the nested logit model is proposed. The model takes into account the cross similarities between different pure and combined modes. The cross-nested structure allows for the introduction of the differentiated measurement of pairwise similarities among modes as opposed to the inflexible groupwise similarities permitted by the nested logit model. The proposed model is described, and it is compared with alternative modeling constructs.

scholarly journals Location of the city bike station as an element of shaping the communication policy in cities

2019 ◽  
Vol 24 (6) ◽  
pp. 394-399 ◽  
Author(s):  
Marzenna Dębowska-Mróz ◽  
Piotr Lis ◽  
Sebastian Pawłowski
Keyword(s):  
Spatial Relations ◽  
Urban Transport ◽  
The Other ◽  
Spatial Extent ◽  
Transport Systems ◽  
Communication Policy ◽  
Communication Efficiency ◽  
Bicycle Infrastructure ◽  
The One ◽  
The City

Efficient implementation of displacements in cities requires, on the one hand, understanding in terms of transport needs, time of their formation, frequency, spatial extent (determining spatial relations) and, on the other hand, proper linking of all available methods of solving problems related to communication efficiency of urban transport systems. In recent years, the approach to the preferred forms of displacement in cities has changed. More and more often, residents use bicycles to implement everyday displacements. An important role in changing the approach to the method of displacement is played by the popularity and development of city bike systems. The article presents the results of research carried out on the occasion of social consultations regarding Radom Municipal Bike and the expected changes regarding the development of bicycle infrastructure in Ra-dom. The detailed characteristics of selected Radomski Rower Miejski stations in Radom were also presented.

scholarly journals Smart Cities in Turkey: Approaches, Advances and Applications with Greater Consideration for Future Urban Transport Development

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2308 ◽  
Author(s):  
Can Bıyık
Keyword(s):  
Urban Areas ◽  
Planning Process ◽  
Smart Cities ◽  
Radical Change ◽  
Urban Transport ◽  
Transport Systems ◽  
Structured Interviews ◽  
Policy Makers ◽  
Comprehensive Survey ◽  
Future Vision

The smart city transport concept is viewed as a future vision aiming to undertake investigations on the urban planning process and to construct policy-pathways for achieving future targets. Therefore, this paper sets out three visions for the year 2035 which bring about a radical change in the level of green transport systems (often called walking, cycling, and public transport) in Turkish urban areas. A participatory visioning technique was structured according to a three-stage technique: (i) Extensive online comprehensive survey, in which potential transport measures were researched for their relevance in promoting smart transport systems in future Turkish urban areas; (ii) semi-structured interviews, where transport strategy suggestions were developed in the context of the possible imaginary urban areas and their associated contextual description of the imaginary urban areas for each vision; (iii) participatory workshops, where an innovative method was developed to explore various creative future choices and alternatives. Overall, this paper indicates that the content of the future smart transport visions was reasonable, but such visions need a considerable degree of consensus and radical approaches for tackling them. The findings offer invaluable insights to researchers inquiring about the smart transport field, and policy-makers considering applying those into practice in their local urban areas.

scholarly journals Accommodating Taste and Scale Heterogeneity for Front-Seat Passenger’ Choice of Seat Belt Usage

Mathematics ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 460 ◽  
Author(s):  
Mahdi Rezapour ◽  
Khaled Ksaibati
Keyword(s):  
Mixed Model ◽  
Seat Belt ◽  
Model Fit ◽  
Model Parameters ◽  
Extended Model ◽  
Random Parameters ◽  
Front Seat ◽  
Scale Heterogeneity ◽  
Error Terms ◽  
The Cost

There is growing interest in implementation of the mixed model to account for heterogeneity across population observations. However, it has been argued that the assumption of independent and identically distributed (i.i.d) error terms might not be realistic, and for some observations the scale of the error is greater than others. Consequently, that might result in the error terms’ scale to be varied across those observations. As the standard mixed model could not account for the aforementioned attribute of the observations, extended model, allowing for scale heterogeneity, has been proposed to relax the equal error terms across observations. Thus, in this study we extended the mixed model to the model with heterogeneity in scale, or generalized multinomial logit model (GMNL), to see if accounting for the scale heterogeneity, by adding more flexibility to the distribution, would result in an improvement in the model fit. The study used the choice data related to wearing seat belt across front-seat passengers in Wyoming, with all attributes being individual-specific. The results highlighted that although the effect of the scale parameter was significant, the scale effect was trivial, and accounting for the effect at the cost of added parameters would result in a loss of model fit compared with the standard mixed model. Besides considering the standard mixed and the GMNL, the models with correlated random parameters were considered. The results highlighted that despite having significant correlation across the majority of the random parameters, the goodness of fits favors more parsimonious models with no correlation. The results of this study are specific to the dataset used in this study, and due to the possible fact that the heterogeneity in observations related to the front-seat passengers seat belt use might not be extreme, and do not require extra layer to account for the scale heterogeneity, or accounting for the scale heterogeneity at the cost of added parameters might not be required. Extensive discussion has been made in the content of this paper about the model parameters’ estimations and the mathematical formulation of the methods.

Research on SUE DTA Model with Constant Demand Based on Probit Model

2011 ◽  
Vol 374-377 ◽  
pp. 2605-2609
Author(s):  
Lei Shi ◽  
Li Gao
Keyword(s):  
Logit Model ◽  
Existence And Uniqueness ◽  
Probit Model ◽  
The Other ◽  
A Algorithm ◽  
Model Based

Logit model is among the most important model in SUE DTA study. A lot of work have been done based on Logit model. As the other very important SUE DTA model, Probit model has not been the focus of many researcher. This paper presents a SUE model based on Probit model, which aims at building up the Probit model with constant demand. The existence and uniqueness of the model is presented, Finally, a algorithm is given.

Numerical Simulation and Analysis of Compartment Fire in Subway Train

2012 ◽  
Vol 166-169 ◽  
pp. 2726-2730
Author(s):  
Bo Si Zhang ◽  
Shou Xiang Lu
Keyword(s):  
Numerical Simulation ◽  
Transport System ◽  
Fire Safety ◽  
Urban Transport ◽  
The Other ◽  
Compartment Fire ◽  
Fire Simulation ◽  
Subway Train ◽  
Simulation Time

Subway plays an important role in urban transport system. Fire as the major risk of the subway, is gaining increasing concern. In this study, fire simulation is performed to estimate fire safety of different compartments of the subway train. Result shows that the two compartments in the middle become dangerous at 150s and the compartments in the two ends are not safe at 300s approximately. The other two compartments are always safe during the simulation time.

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