The SHARP assessment is based on independent research and recommendations. The two primary sources of evidence are in the recommendations made by the COST (Cooperation in Scientific and Technical Research) 327 study – the most comprehensive study of motorcycle crashes ever conducted in Europe. There is also research carried out by the Transport Research Laboratory (under contract to the UK DfT) including: Motorcycle helmets: test and assessment protocol prove out. Copies of these reports can be found in the library section of this website.