IMPLEMENTATION OF THE RESULTING COST MODEL OF ROADS NETWORK
IN THE GEOGRAPHIC INFORMATION SYSTEM (GIS)
Abolghasem Sadeghi Niaraki
a-sadeghi(@tto.ir
GIS Engineer, MSc. Faculty of Geomantic Engineering, K.N. Toosi University of Technology(Study).
Transportation & Terminals Organization (T.T.O). GIS Office, 6th floor, No.19, Dameshgh St.,Vali_Asr Sq., Tehran,
Iran,P.Box:14155-3773 WEBGIS: www.lranRoads.com Tel :( +9821)889 0830- Fax :( +9821) 889 8394
Masood Varshosaz, Assistant Prof.
varshosazm@kntu.ac.ir
Department of Geomantic Engineering, Surveying Faculty,K.N. Toosi University of Technology
Vali Asr St., Mirdamad cross, Tehran, Iran 19967-15433, Tel :( +98 21) 877 9475, Fax :( +98 21) 877 9476
Hojat Behrooz*,
IT Manager, "hojat@tto-ir.org"
Keyword: Road Network Analysis, GIS, AM/FM, And Cost Model.
Abstract:
After reaching to the primary cost model of the ro
in order to bring about an alternative route netw
ads network of the country through the analytical hierarchical process
ork for the traditional network which is far from reality since it just
uses only length and time parameters for giving value to the routes, now in order to test the new cost model which
hould implement it in the GIS environment. In this
considers more elements than just time and length parameters, we s
article after a brief explanation. about the method of elements determination in this model, the method of
implementation will be mostly considered. The Tehran-Mashhad route was selected for testing the resulting models
because of its variation. The results said that the answers are according to the real world situation.
characteristics and additional facilities and capabilities
of that part an its nearby environment. Considering the
variety of criteria in cost modeling these criteria are
divided in to three groups of road, vehicle and humane
factors (Table 1). Considering the short opportunity of
preparing this paper and also the lack of sufficient
information the modeling contains only some of the
road criterion factors (Table 2)
The traffic rates, safety and security of the road,
weather condition and road type are some examples of
road criterion factors. The vehicle type and extent and
type of fuel of that it use and ... are examples of
second group of factors which show the influence of
vehicle in determination of the optimum route. The
last group of factors is dedicated to humane factors
including the age and skill of driver, the power of sight
and familiarity of driver with car technical affairs.
Among above-mentioned factors the road criterion
factors are more general applicable in route finding
analysis since the relevant information to this factors
are more accessible than other two groups of factors.
So in this paper we work on road factors on the other
hand the weight of these parameters is also dependent
on the vehicles types so the in the mentioned issues in
this regard the cars are considered.
1- Introduction:
In Geographic Information Systems (GIS), network
analysis is one of the most powerful tools. Selecting
optimum paths for inter-cities traveling, transportation
vehicles of domestic, directing the bus fleet of tourism
corporations and international transportation
companies are some examples of network analysis
applications. So different parts of the routes network
are evaluated considering their distance and required
time to pas each part to analyze the optimum route to
take. Unfortunately the route analysis through these
two variables of time and distance can determine the
exact specifications of network and practically results
in dissatisfaction of GIS users. In next sections of this
paper it will be shown that considering sufficient and
suitable variables in selecting routes based on GIS
environment will results in better suggestions about
the optimum route between Tehran and Mashhad
following section introduces the proper effective
criteria used in cost model.
2- The Criteria in roads cost:
Basically the main criteria effecting on roads are
divided in to three groups of road humane and vehicle
factors [Sadeghi —2002] the road criteria include that
kinds of factors effecting on the value of a specific
part of a route network and determines the
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