A constrained interactance model for trip distribution
A constrained interactance model for trip distribution

Author: Gary D. Long

Publisher:

Published: 1973

Total Pages: 570

ISBN-13:

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To estimate the future volume of trips interchanging between each pair of zones within an urban area, a simple behavioral model of travel interaction is presented. The interactance model is subjected to a set of five constraints, which reflect pertinent conditions that should be fulfilled in the resulting distribution. A method is developed to distribute future trips in accordance with the interactance model so that all constraints will be satisfied. The constrained interactance model differs from other trip distribution models in that the distribution of trip lengths is constrained to result as given in advance. Furthermore, no model calibration is necessary. Rather than the conventional use of subjective judgements to distinguish the travel movements which warrant exogenous compensations to correct for socioeconomic biases, an objective procedure utilizing a statistical test is provided. Socioeconomic and geographic compensations, where needed, are applied between pairs of groups of contiguous and homogeneous zones rather than between individual zone pairs. A model is developed to determine the total number of zone pairs expected to have travel interactions in an urban area, as a function of the number of trips and zones. Another model which describes travel interaction propensities as related to travel disutility, is developed to indicate which pairs of zones are the least likely to have travel interactions, and should be dropped from the trip distribution, in order to restrict the number of travel interactions to the estimated total. ...

Methods and Models in Transport and Telecommunications
Methods and Models in Transport and Telecommunications

Author: Aura Reggiani

Publisher: Springer Science & Business Media

Published: 2006-03-30

Total Pages: 361

ISBN-13: 3540285504

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One aspect of the new economy is a transition to a networked society, and the emergence of a highly interconnected, interdependent and complex system of networks to move people, goods and information. An example of this is the in creasing reliance of networked systems (e. g. , air transportation networks, electric power grid, maritime transport, etc. ) on telecommunications and information in frastructure. Many of the networks that evolved today have an added complexity in that they have both a spatial structure – i. e. , they are located in physical space but also an a spatial dimension brought on largely by their dependence on infor mation technology. They are also often just one component of a larger system of geographically integrated and overlapping networks operating at different spatial levels. An understanding of these complexities is imperative for the design of plans and policies that can be used to optimize the efficiency, performance and safety of transportation, telecommunications and other networked systems. In one sense, technological advances along with economic forces that encourage the clustering of activities in space to reduce transaction costs have led to more efficient network structures. At the same time the very properties that make these networks more ef ficient have also put them at a greater risk for becoming disconnected or signifi cantly disruptedwh en super connected nodes are removed either intentionally or through a targeted attack.

Forecasting Urban Travel
Forecasting Urban Travel

Author: David E. Boyce

Publisher: Edward Elgar Publishing

Published: 2015-02-27

Total Pages: 661

ISBN-13: 1784713597

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Forecasting Urban Travel presents in a non-mathematical way the evolution of methods, models and theories underpinning travel forecasts and policy analysis, from the early urban transportation studies of the 1950s to current applications throughout the

Transport Network Planning
Transport Network Planning

Author: Patrick O'Sullivan

Publisher: Routledge

Published: 2021-12-10

Total Pages: 190

ISBN-13: 100040322X

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Originally published in 1979 and with a case-study from Indonesia, this volume examines the question of planning the provision of transport facilities as a special case of the general planning problem. It deals with the modelling (including conceptual short-comings of it), analysis, estimation and control of transport planning and the challenges associated with planning in uncertainty. As well as devoting specific chapters to network planning, the book also provides background material on transport planning, locational theory and economics.