Investigating pedestrian injury crashes on modern roundabouts in Addis Ababa, Ethiopia

Tulu, Getu Segni, Haque, Md. Mazharul, Washington, Simon, & King, Mark J. (2015) Investigating pedestrian injury crashes on modern roundabouts in Addis Ababa, Ethiopia. Transportation Research Record, 2512, pp. 1-10.

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Abstract

Pedestrian crashes are one of the major road safety problems in developing countries representing about 40% of total fatal crashes in low income countries. Despite the fact that many pedestrian crashes in these countries occur at unsignalized intersections such as roundabouts, studies focussing on this issue are limited—thus representing a critical research gap. The objective of this study is to develop safety performance functions for pedestrian crashes at modern roundabouts to identify significant roadway geometric, traffic and land use characteristics related to pedestrian safety. To establish the relationship between pedestrian crashes and various causal factors, detailed data including various forms of exposure, geometric and traffic characteristics, and spatial factors such as proximity to schools and proximity to drinking establishments were collected from a sample of 22 modern roundabouts in Addis Ababa, Ethiopia, representing about 56% of such roundabouts in Addis Ababa. To account for spatial correlation resulting from multiple observations at a roundabout, both the random effect Poisson (REP) and random effect Negative Binomial (RENB) regression models were estimated and compared. Model goodness of fit statistics reveal a marginally superior fit of the REP model compared to the RENB model of pedestrian crashes at roundabouts. Pedestrian crossing volume and the product of traffic volumes along major and minor road had significant and positive associations with pedestrian crashes at roundabouts. The presence of a public transport (bus/taxi) terminal beside a roundabout is associated with increased pedestrian crashes. While the maximum gradient of an approach road is negatively associated with pedestrian safety, the provision of a raised median along an approach appears to increase pedestrian safety at roundabouts. Remedial measures are identified for combating pedestrian safety problems at roundabouts in the context of a developing country.

Impact and interest:

2 citations in Scopus
2 citations in Web of Science®
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ID Code: 81924
Item Type: Journal Article
Refereed: Yes
Additional Information: Paper presented in Transportation Research Board 94th Annual Meeting, Washington DC, United States, 11-15 January 2015
Additional URLs:
Keywords: pedestrians, crashes, roundabouts, Ethiopia
DOI: 10.3141/2512-01
ISSN: 0361-1981
Divisions: Current > Research Centres > Centre for Accident Research & Road Safety - Qld (CARRS-Q)
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Psychology & Counselling
Copyright Owner: Copyright 2015 Transportation Research Board (US)
Deposited On: 19 Feb 2015 23:49
Last Modified: 01 Dec 2015 19:30

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