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|Title: ||Impact of methodological choices on road safety ranking|
|Authors: ||HERMANS, Elke|
VAN DEN BOSSCHE, Filip
|Issue Date: ||2007|
|Publisher: ||Steunpunt Mobiliteit & Openbare Werken – Spoor Verkeersveiligheid|
|Abstract: ||Composite indicators aggregate a lot of information in one index based on which
countries are often ranked. However, the position of a country can largely be influenced
by the methodological choices made during the composite indicator process. This process
consists of several phases such as selecting appropriate indicators, normalising the
indicator values, assigning a weight to each indicator and selecting an aggregator.
In order to guarantee a robust index considering several possibilities and alternative
techniques during each phase, an uncertainty and sensitivity analysis is essential.
Researchers, policymakers as well as the community of road users will benefit from such
analysis. The most influencing methodological aspects will be indicated for which extra
information is most valuable in order to reduce the uncertainty in the end result.
Incorporating the necessary uncertainty and sensitivity analysis in the process is an
aspect that will enlarge the acceptability of composite indicators.
In this research, the road safety ranking of countries based on different weighting and
indicator options is studied. The results show that the ranking of countries differs
significantly according to the selected weighting method, expert and set of indicators. Of
these three factors, the indicator set resulted to be the most influencing factor. Additional
research on the selection of appropriate indicators (beside other aspects) will reduce the
uncertainty in ranking and help in obtaining a robust road safety index.|
|Link to publication: ||http://www.steunpuntmowverkeersveiligheid.be/nl/modules/press_publications/show_publication.php?id=147|
|Type: ||Research Report|
|Appears in Collections: ||Research publications|
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