Road authorities in the Netherlands stimulate the use -more specifically, the correct use- of restraint systems. A clear insight into the frequency and type of misuse is important for better design of safety devices, for legislation and for adequate public information.
Commissioned by the Ministry for Transport and Publics Works, the SMOV and IW-TNO have carried out a research project to establish the extenta nd type of misuse of childs seats and standard seat belts. This paper deals only with child seats (childrestraints).
Ing the first stage of the project, a method for measuring misuse was defined. Assessments of injury potential were based on accepted criteria in combination with knowledge derived from extensive laboratory testing and accident data.
A special formand and a rating system were developed to judge the overall severity of misuse.
In the second stage, a field study was conducted at parking areas of shopping centres, roadside restaurants and theme parks such as zoos. The use of child restraints in the cars of the visitors was observed by trained technical students. Data on some 5OO childseats were collected.
Considering the overall results, the degree of misuse of childseats was considerable: for almost 70% of seats, serious errors were noted. Recommendations are given concerning an internationally accepted and standardised method of measuring the misuse of childrestraints.