文档介绍：National Technical University of Athens
Chemical Engineering Department
A GIS-Based Decision Support System for
Planning Urban Transportation Policies
It was implemented according to a
three-step schema that involves (a) the
database, (b) a number of mathematical
models for traffic assignment as well as
for emission and energy consumption
estimation, and (c) the user-interface for
creating “what-if?” scenarios and
presenting model results through
appropriate thematic maps, figures and
diagrams
GIS Database
The GIS database is the heart of spatial
and operational information system and
provides the central storage system and
munication between the
various sub-models. It anized on
the basis of the work map. Each
link has as attributes topographic (. nodes UTM co-
Overview ordinates, total length), toponomastic (street names),
physical (traffic directions, number of lanes), transport
The tool is a Decision-Support System (DSS) inte- (road typology by means of speed-flow curves) and
grated in a Geographical Information System (GIS) for
the analysis and evaluation of urban transportation
policies. The objective of the tool is to assist transport
administrators to enhance the efficiency of the trans-
portation supply while improving environmental and
energy indicators. It involves realistic represen