Recent developments in the technical field have solved many problems in applying theory to practice. Short-term evaluation of safety measures has become more and more important and at the same time much has happened in the field of theoretical development. With short-term evaluation there is a better possibility of getting an insight into the real process of the traffic. We are able to measure the basic changes in the variables that connect behaviour for instance to the improvement of safety. At the same time we meet new challenges such as questions of generalization of results, controlling factors and planning of test arrangements. The experiences we have show that short-term evaluation can be a very useful tool in producing information for decisions. Methods have been used often in giving quick answers for restricted and practical questions. Relevant hypotheses should be tested and also the exact control of the possible affecting variables is a prerequisite for using the results in safety work. We cannot give up the use of statistics. They have their role at least in routine safety work. Short-term evaluation of safety measures has its advantages in the possibilities of quick analysis and close connection with the explaining variables. For the covering abstract of the conference see IRRD abstract no 264967.
Samenvatting