Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/14219
Title: Road safety risk evaluation and target setting using data envelopment analysis and its extensions
Authors: SHEN, Yongjun 
HERMANS, Elke 
BRIJS, Tom 
WETS, Geert 
VANHOOF, Koen 
Issue Date: 2012
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Source: ACCIDENT ANALYSIS AND PREVENTION, 48, p. 430-441
Abstract: Currently, comparison between countries in terms of their road safety performance is widely conducted in order to better understand one's own safety situation and to learn from those best-performing countries by indicating practical targets and formulating action programmes. In this respect, crash data such as the number of road fatalities and casualties are mostly investigated. However, the absolute numbers are not directly comparable between countries. Therefore, the concept of risk, which is defined as the ratio of road safety outcomes and some measure of exposure (e.g., the population size, the number of registered vehicles, or distance travelled), is often used in the context of benchmarking. Nevertheless, these risk indicators are not consistent in most cases. In other words, countries may have different evaluation results or ranking positions using different exposure information. In this study, data envelopment analysis (DEA) as a performance measurement technique is investigated to provide an overall perspective on a country's road safety situation, and further assess whether the road safety outcomes registered in a country correspond to the numbers that can be expected based on the level of exposure. In doing so, three model extensions are considered, which are the DEA based road safety model (DEA-RS), the cross-efficiency method, and the categorical DEA model. Using the measures of exposure to risk as the model's input and the number of road fatalities as output, an overall road safety efficiency score is computed for the 27 European Union (EU) countries based on the DEA-RS model, and the ranking of countries in accordance with their cross-efficiency scores is evaluated. Furthermore, after applying clustering analysis to group countries with inherent similarity in their practices, the categorical DEA-RS model is adopted to identify best-performing and underperforming countries in each cluster, as well as the reference sets or benchmarks for those underperforming ones. More importantly, the extent to which each reference set could be learned from is specified, and practical yet challenging targets are given for each underperforming country, which enables policymakers to recognize the gap with those best-performing countries and further develop their own road safety policy. (C) 2012 Elsevier Ltd. All rights reserved.
Notes: [Shen, Yongjun; Hermans, Elke; Brijs, Tom; Wets, Geert; Vanhoof, Koen] Hasselt Univ, Transportat Res Inst IMOB, B-3590 Diepenbeek, Belgium. yongjun.shen@uhasselt.be
Keywords: Road safety; Risk indicators; Performance evaluation; Target setting; Data envelopment analysis; Cross-efficiency; Clustering analysis;Ergonomics; Public, Environmental & Occupational Health; Social Sciences, Interdisciplinary; Transportation; road safety; risk indicators; performance evaluation; target setting; data envelopment analysis; cross-efficiency; clustering analysis
Document URI: http://hdl.handle.net/1942/14219
ISSN: 0001-4575
e-ISSN: 1879-2057
DOI: 10.1016/j.aap.2012.02.020
ISI #: 000307140500049
Category: A1
Type: Journal Contribution
Validations: ecoom 2013
Appears in Collections:Research publications

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