A study from the Insurance Institute for Highway Safety, "Cyclist Crash Scenarios and Factors Relevant to the Design of Cyclist Detection Systems," reviews bicycle-vehicle crash data from federally maintained national databases and identifies common and particularly deadly crash scenarios between cyclists and vehicles. Detailed information regarding crash scenarios and factors is crucial to the development of cyclist detection warning and crash avoidance systems on motor vehicles.  The report finds that effective cyclist detection systems could help mitigate or prevent up to 47 percent of crashes, 48 percent of injuries and 38 percent of fatalities, potentially saving up to 274 lives annually.