C. Ding, THE GIS-BASED HUMAN-INTERACTIVE TAZ DESIGN ALGORITHM - EXAMINING THE IMPACTS OF DATA AGGREGATION ON TRANSPORTATION-PLANNING ANALYSIS, Environment and planning. B, Planning & design, 25(4), 1998, pp. 601-616
An aggregate approach (traffic analysis zones, TAZs) has been used to
conduct conventional transportation-planning analysis. The impact of a
TAZ (sizes and boundaries) on traffic demand estimates and evaluation
of transportation systems, however, has not been addressed adequately
in the literature, In this paper I will attempt to examine the impact
of spatial data aggregation on transportation by generating TAZ alter
natives and building linkages among land use, transportation, and GIS.
This paper consists of two major components. In the first, attention
is focused on the discussion of the GIS-based interface system which l
inks land use, transportation, and GIS. The GIS-based interface system
also includes a GIS-based human-interactive TAZ design algorithm that
generates TAZ alternatives. In the second, I concentrate on the exami
nation of the impact of TAZs on transportation. This is conducted by s
imulations, which create TAZ alternatives and report final estimates o
f traffic demand and evaluation of transportation systems. It is concl
uded that spatial data aggregation affects the outcomes of transportat
ion-planning models significantly, particularly when the number of TAZ
s is small.