The European Commission has recently released a Report on Event Data Recorders (EDR),  prepared by the Transport Research Laboratory. The objective of this study was to assist the European Commission in deciding whether the fitting  of EDR in all vehicles or certain categories of vehicles could result in an improvement of road safety or have other possible consequences that would justify the costs associated with the adoption of EU legislative measures. The study aimed to quantify the costs and benefits for heavy goods vehicles, light goods vehicles, buses and coaches, and passenger cars (for private and commercial use). According to this study, the benefits of EDRs are consistently documented in terms of road safety, vehicle design, accidentology and accident reconstruction and legal accident proceedings.