Vehicle safety ratings estimated from combined Australian and New Zealand real crash data. Pilot study: Stage 5

Monash University Accident Research Centre - Report #203 - 2003

Authors: Newstead, S.V., Delaney, A.K. & Watson, L.M.

Full report in .pdf format [880KB]

Crashworthiness ratings measure the relative safety of vehicles in preventing severe injury to their own drivers in crashes whilst aggressivity ratings measure the serious injury risk vehicles pose to drivers of other vehicles with which they collide. Analysis presented in this report has been successful in producing a set of vehicle safety ratings based on combined Australian and New Zealand mass crash data sources suitable for publishing as consumer information in both countries. The study has also demonstrated the consistency of ratings estimated from combined Australian and New Zealand data with those estimated from Australian data only as well as quantifying the improvement in the ratings resulting from addition of the New Zealand data. Crashworthiness and aggressivity ratings for 1982-2000 model vehicles appearing in both the Australian and New Zealand vehicle fleet were developed based on data on crashes in Victoria and New South Wales during 1987-2000 and in Queensland, Western Australia and New Zealand during 1991-2000. Crashworthiness and aggressivity were measured by a combination of injury severity (of injured drivers) and injury risk (of drivers involved in crashes). The ratings were adjusted for the driver sex and age, the speed limit at the crash location, the number of vehicles involved, the state or country in which the crash occurred and the year in which the crash occurred. These factors were strongly related to injury risk and/or severity for both aggressivity and crashworthiness. Both ratings estimate, with the appropriate focus, the risk of a driver being killed or admitted to hospital when involved in a tow-away crash, to a degree of accuracy represented by the confidence limits of the rating in each case.

The results of this report are based on a number of assumptions and warrant a number of qualifications that should be noted. Recommendations for further research have been made.

Sponsoring Organisation - This project was funded as contract research by the following organisation: Land Transport Safety Authority, New Zealand