Samenvatting
A Symposium on Traffic Safety Program Effectiveness (impact) Evaluation Projects was held on May 19-21 at Chicago, Illinois. It described traffic safety countermeasures and evaluation project results to decision makers and other users at the state level. Presentations were selected from 32 reports submitted by the NHTSA Office of Program and Demonstration Evaluation. These projects were evaluated for the scientific quality of the effectivenes (impact) evaluations conducted and their potential use to the participants.