The Cost Model of Iran Roads Network
Abolghasem Sadeghi Niaraki
Terminals & Transportation Organization
ValiAsr Sq., Dameshgh Str. ,
No. 19,6 th floor, Tehran,
Tel: (+98 21)880 4363, Fax: (+98 21) 889 8394
Dr Masood Varshosaz
Head of Department of Remote Sensing and Photogrammetry,
Surveying college K.N. Toosi University of Technology
ValiAsr Street, Mirdamad cross
Tehran, Iran 19967-15433
Tel: (+98 21)877 0006, Fax: (+98 21) 877 9476
Finding a best rout between two points of a network is a common task in most Geographic Information Systems (GIS). A network and its segments are normally evaluated based on the distance or time required to travel from one node into another. The best path is, then, defined such that the total time or distance between the two nodes is at a minimum. Unfortunately, within road networks using time or distance alone may lead to results not necessarily desired by users. In other words, a user may additionally be interested to choose his/her rout based the amount of road traffic, climate, road width and class, nearness to tourist or religious centres, hospitals, and petrol stations and so on. As a result, parameters of such may need to be taken into account in order to obtain more realistic and satisfactory decisions in a road network analysis.
This paper is concerned with the development of a suitable cost model, derived based on a number of quantitative and qualitative parameters which affect the value of a road segment. Once formed, the model was tested in parts of Iran road network. Due to the diversity of weather conditions and user tastes the model was implemented and evaluated in four separate cases. The preliminary results showed that utilising the parameters presented in this article and the way they are formulated, can lead to routs of more satisfaction to users.