A Simulation-Based Accessibility Modeling Approach to Evaluate Performance of Transportation Networks by using Directness Concept and GIS

Authors

  • Kıvanç Ertugay Dr. in Urban and Regional Planning department in Konya Technical University, Konya / Turkey Email1: kivancertugay@gmail.com, Email2: kertugay@ktun.edu.tr http://orcid.org/0000-0001-9593-3548

DOI:

https://doi.org/10.15320/ICONARP.2019.93

Keywords:

GIS, accessibility modeling, simulation, urban planning, transportation network directness, circuity, test of transportation network performance, Euclidian distance, bird flight distance, network distance

Abstract

Ranging from simple to sophisticated, numerous types of accessibility measures are found in the accessibility modeling literature which helps to understand accessibility of people, place and transportation networks. Transportation network directness (reciprocal is “circuity”), which is defined as the ratio of the shortest Euclidean distance over network distance between demand (origin) and destination (supply) points, could be considered as an important type of measure for understanding accessibility for a variety of context. 

Although there are several research and literature on transportation network directness and accessibility modeling, the research that integrates transportation network directness concept into accessibility modeling process in such a way to provide understanding of the overall accessibility performance of the transportation networks without losing the local interactions is quite limited.

Based on this idea, the basic aim of this research is to propose a new transportation network directness-based accessibility modeling methodology that could be used to test both the local and the overall accessibility performance of transportation networks in a simple and comparable manner by using GIS. By considering regularly produced virtual origins and destinations on the transportation network in a “simulation” manner, the proposed methodology could produce “travel time/distance” based accessibility measures that could operate without a need for real time supply/demand or origin/destination data.

The advantage of using a virtual regular data set instead of real time data is that; it is more simple, easy to operate and most importantly, more realistic to understand performance of transportation networks as most of the possible origin/destination scenarios could be represented in the proposed model. The outputs of the model could be widely used by the decision-makers who are supposed to deal with accessibility, location/allocation, and service/catchment area related issues by several aims such as; to test the overall/partial performance of the transportation networks, to understand the weakly connected parts of the transportation network and/or to compare the accessibility performance of different networks with each other.

The proposed methodology is applied in 3 cities with different types of transportation network which are Paris, FRANCE (radial network); San Francisco, USA (grid network) and Ankara, TURKEY (mixed network) in order to able to demonstrate the performance and efficiency of the proposed model. The main focus of the case study is not to evaluate specific accessibility conditions or transportation network performance in a detailed manner but to provide a methodological discussion about the proposed directness based accessibility modeling process.

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Author Biography

Kıvanç Ertugay, Dr. in Urban and Regional Planning department in Konya Technical University, Konya / Turkey Email1: kivancertugay@gmail.com, Email2: kertugay@ktun.edu.tr

He was born in Ankara in 1976. He has an undergraduate degree from Gazi University, Faculty of Architecture, Department of City and Regional Planning (1999), has masters and Ph.D. degree from Middle East Technical University, Graduate School Of Natural And Applied Sciences, Geodetic and Geographic Information Technologies Department (2003 and 2012). During his Ph.D. study, he was found as a guest researcher at the University of California, Berkeley, Institute of Urban and Regional Development (2009- 2010). He worked at Gazi University, Faculty of Architecture, Department of Urban and Regional Planning for 2 years as Research Assistant (2000-2002), at Middle East Technical University, Institute of Science, Geodesy and Geographical Information Technologies for 10 years as Research Assistant (2002-1012). Since 2012, he is working at Selçuk University (newly Konya Technical University), Faculty of Architecture and Design, Department of City and Regional Planning as researcher. His research interests include Geographical Information Science, Spatial, Network and 3D Analysis in Urban and Regional Planning Related Processes, Urban Transportion Planning

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Published

30-12-2019

How to Cite

Ertugay, K. (2019). A Simulation-Based Accessibility Modeling Approach to Evaluate Performance of Transportation Networks by using Directness Concept and GIS. ICONARP International Journal of Architecture and Planning, 7(2), 460–486. https://doi.org/10.15320/ICONARP.2019.93

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