The objective of this accident review is to check what proportion of accidents recorded in the past could in principle have been prevented by using an incident warning system (IWS). The accident review was carried out for all three IWS test sites that are part of the HOPES evaluation study. These include: (1) the EUROTRIANGLE system; (2) the PORTICO system; and (3) the MELYSSA system. An additional aim of the before study is to detect particular safety problems at the IWS test sites. It is assumed that the IWS prevents only those accident types that are related to the warning messages given. Traffic safety is expressed in both the total number of accidents, and in relation to risk exposure. A general safety description regarding the total traffic amount is given for both the experimental sections and for control sections. The accident files differed considerably between the three projects, both in the amount of detail and in the categories used to score the accidents. However, the relevant accident types could be distinguished for all three locations. One of the recommendations is to perform an after study, using the outcomes of the study.
Samenvatting