Zoning Decisions in Transport Planning and Their Impact on the Precision of Results
- 1 January 2007
- journal article
- Published by SAGE Publications in Transportation Research Record: Journal of the Transportation Research Board
- Vol. 1994 (1), 58-65
- https://doi.org/10.3141/1994-08
Abstract
In most transport planning studies, one of the first steps is the definition of a zoning scheme into which the study area is divided and the corresponding space is discretized. There are no clear rules on how to carry out this operation in an optimal way, and the dominating practice is to proceed on the basis of experience, trying to mix a certain degree of within-zone homogeneity and the convenience of using administrative borders as zone limits. The potential errors generated with this operation were examined, both at the statistical level when trip matrices are based on sampling and at the geographical level when all trips starting or ending in a zone are assumed to do so at its centroid. A set of quality criteria for a general zoning scheme and an algorithm that constructs a basic zoning on the basis of a sample of geo-referenced trip extreme points and improves it in successive steps according to those criteria are presented. A case study based on the mobility survey for the Lisbon, Portugal, metropolitan area illustrates those steps and the improvements achieved in each step. The magnitude of those improvements is significant and shows that more attention should definitely be given to this initial process in the transport planning studies.Keywords
This publication has 6 references indexed in Scilit:
- Effects of Zoning Structure and Network Detail on Traffic Demand ModelingEnvironment and Planning B: Planning and Design, 2002
- Analyse orientée-objet et totalement désagrégée des données d'enquêtes ménages origine-destinationCanadian Journal of Civil Engineering, 2001
- The GIS-based human-interactive TAZ design algorithm: examining the impacts of data aggregation on transportation-planning analysisEnvironment and Planning B: Planning and Design, 1998
- The overlaid network algorithms for areal interpolation problemComputers, Environment and Urban Systems, 1995
- Algorithms for Reengineering 1991 Census GeographyEnvironment and Planning A: Economy and Space, 1995
- Optimal Zoning Systems for Spatial Interaction ModelsEnvironment and Planning A: Economy and Space, 1977