Abstract
The purpose of this literature scan is to examine where literature on the effect of external factors and road safety measures on road safety exists and where it is lacking. This scan will help us to decide which factors to include in a comprehensive road safety model as SWOV is working on, and at the same time identifies promising future research topics. The report is divided into two main road safety topics; firstly, the external influences which are not directly related to road safety management but do affect road safety and, secondly, road safety measures which aim to improve road safety.