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Author: Sven Erlander
Publisher: VSP
ISBN: 9789067640893
Category : Transportation
Languages : en
Pages : 252
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Book Description
Analisi: TRASPORTI. In generale. ECONOMETRIA. Econometria applicata.
Author: Sven Erlander
Publisher: VSP
ISBN: 9789067640893
Category : Transportation
Languages : en
Pages : 252
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Book Description
Analisi: TRASPORTI. In generale. ECONOMETRIA. Econometria applicata.
Author: Nancy L. Nihan
Publisher:
ISBN:
Category : Traffic engineering
Languages : en
Pages : 268
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Book Description
Author: Ashish Sen
Publisher: Springer Science & Business Media
ISBN: 3642798802
Category : Business & Economics
Languages : en
Pages : 586
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Book Description
Gravity models describe, and hence help predict, spatial flows of commuters, air-travelers, migrants, commodities and even messages. They are one of the oldest and most widely used of all social science models. This book presents an up-to-date, consistent and unified approach to the theory, methods and application of the gravity model - which spans from the axiomatic foundations of such models all the way to practical hints for their use. "I have found no better general method for use in applied research dealing with spatial interaction... It is against this background that the present book by Sen and Smith is most welcomed." Walter Isard
Author: F. Svenaeus
Publisher: Springer
ISBN: 9783642455162
Category : Business & Economics
Languages : en
Pages : 113
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Book Description
This book has grown out of a desire to explore the possibilities of using optimizing models in transportation planning. This approach has been followed throughout. Models which combine descriptive and optimizing elements are not treated. The gravity model is here studied as the solution to an optimizing model. In spite of this approach, much of the material shoula be of general interest. Algorithms are not discussed. The author has benefited from discussions with many colleagues. M. Florian suggested the term "interacti vi ty". N. F. Stewart and P. Smeds gave many valu able comments on a first draft. M. Beckmann made me think once more about the final chapters. R. Grubbstrem and K. Jornsten helped clarifYing some things in the same chapters. Remaining insufficiencies are due to the author. Gun Mannervik typed with great patience. Linkoping in October 1979 Sven Erlander ABSTRACT The book proposes extended use of optimizing models in transportation plann ing. An entropy constrained linear program for the trip distribution problem is formulated and shown to have the ordinarJ doubly constrained gravity model as its solution. Entropy is here used as a measure of interactivity, which is constrained to be at a prescribed level. In this way the variation present in the reference trip matrix is preserved. (The properties of entropy as a dispersion measure are shortly discussed. ) The detailed mathematics of the optimal solutions as well as of sensitivity and duality are given.
Author: United States. Bureau of Public Roads
Publisher:
ISBN:
Category : Traffic engineering
Languages : en
Pages : 200
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Book Description
Author: Sven Erlander
Publisher:
ISBN:
Category : Transportation
Languages : en
Pages : 28
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Book Description
Author: Changgi Lee
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The gravity model is widely used to estimate the movement of people and goods. We use the gravity model to explain the characteristics of the movement of Korean people between and within cities via various modes of transportation using data from 246 county/district-level municipalities. We use a PPML gravity model to run regression analyses of traffic at three spatial levels: the national level (all of Korea), metropolitan level (in the Seoul and Busan Metropolitan Transportation Areas (MTAs)), and city-level (in Seoul and Busan). For these geographical areas, we use two variables to represent gravitational mass in the model - regional population and regional GDP per capita (RGDPPC). Introducing regional GDP per capita improves the model fit over all the spatial ranges, but the greatest improvement is at the city level. While the exponent parameter for distance diminishes as spatial ranges decrease, the parameters for population and RGDPPC and their relative ratio remain fairly constant. More traffic is associated with both higher population and higher levels of economic activity, represented by RGDPPC. These parameters can be understood in the model as corresponding to the number of particles and specific density of masses in Newton's gravity law. Based on this result, we suggest the concept of economic activity-adjusted population.
Author: Kingsley E. Heynes
Publisher:
ISBN: 9780608011417
Category :
Languages : en
Pages : 88
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Book Description
Haynes and Fotheringham provide a comprehensive introduction to the four basic forms of gravity models. Gravity and spatial interaction -- extensively applied in forecasting -- has provided a major contribution to social science literature. The authors trace the different applications of the gravity model to market area analysis including: determining the boundaries of market areas, determining the demand for goods or services, and examining problems of operating the retail model. Six fully-developed, real-life examples of the use of these models are presented: planning a new service, defining retail shopping boundaries, forecasting migration and voting patterns, examining university enrollment by area, determining the optimal size of a shopping complex, and locating a facility to maximize custom. The discussion is kept at an elementary mathematical level and is aimed primarily at those unacquainted with the finer workings of gravity and spatial interaction models.
Author: A. Scott MacLean
Publisher:
ISBN: 9780858500112
Category : Transportation
Languages : en
Pages : 81
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Book Description
Author: Jean-Paul Rodrigue
Publisher: Routledge
ISBN: 1136777326
Category : Science
Languages : en
Pages : 432
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Book Description
Mobility is fundamental to economic and social activities such as commuting, manufacturing, or supplying energy. Each movement has an origin, a potential set of intermediate locations, a destination, and a nature which is linked with geographical attributes. Transport systems composed of infrastructures, modes and terminals are so embedded in the socio-economic life of individuals, institutions and corporations that they are often invisible to the consumer. This is paradoxical as the perceived invisibility of transportation is derived from its efficiency. Understanding how mobility is linked with geography is main the purpose of this book. The third edition of The Geography of Transport Systems has been revised and updated to provide an overview of the spatial aspects of transportation. This text provides greater discussion of security, energy, green logistics, as well as new and updated case studies, a revised content structure, and new figures. Each chapter covers a specific conceptual dimension including networks, modes, terminals, freight transportation, urban transportation and environmental impacts. A final chapter contains core methodologies linked with transport geography such as accessibility, spatial interactions, graph theory and Geographic Information Systems for transportation (GIS-T). This book provides a comprehensive and accessible introduction to the field, with a broad overview of its concepts, methods, and areas of application. The accompanying website for this text contains a useful additional material, including digital maps, PowerPoint slides, databases, and links to further reading and websites. The website can be accessed at: http://people.hofstra.edu/geotrans This text is an essential resource for undergraduates studying transport geography, as well as those interest in economic and urban geography, transport planning and engineering.
