Impedance measures in evaluating accessibility change

Wasim Shoman*, Hande Demirel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Earlier location-based accessibility analysis by car mode utilizes network travel distance (NTD) or static travel time (STT) as travel impedances. A recent trend in the literature that considers impedance as dynamic travel time (DTT) emerged, allowing examining continuous accessibility patterns. This research aims to evaluate the measured spatial-temporal change in accessibility for the different travel impedances. The research develops a GIS-remote sensing framework to evaluate the resemblance in spatial and temporal accessibility change at high resolution. It also investigates the dominant impact of significant accessibility components on influencing their results. According to results, impedances of NTD and STT represent almost identical outcomes, with correlation coefficients almost equal to 1.00, while failing to capture the dominant change of accessibility components. However, DTT illustrates varying patterns highly influenced by change in mobility. It shows the interplay between dominant accessibility components at the required resolution, which could facilitate better knowledge-based decisions for policymakers.

Original languageEnglish
Pages (from-to)3642-3657
Number of pages16
JournalGeocarto International
Issue number12
Publication statusPublished - 2022

Bibliographical note

Publisher Copyright:
© 2021 Informa UK Limited, trading as Taylor & Francis Group.


This work was supported by the Scientific and Technological Research Council of Turkey [Grant Number: CAYDAG-115Y692] and ITU-BAP (Istanbul Technical University Scientific Research Project Coordination Unit) [Grant ID: MDK-2018-41462].

FundersFunder number
Türkiye Bilimsel ve Teknolojik Araştırma KurumuCAYDAG-115Y692
Istanbul Teknik ÜniversitesiMDK-2018-41462
Bilimsel Araştırma Projeleri Birimi, İstanbul Teknik Üniversitesi


    • accessibility
    • dynamic impedance
    • Travel impedance
    • travel time


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