Information theory and signal detection theory techniques were used to assess the validity of police reported traffic accident data. The validity criteria were the data and conclusions of muiti-disciplinary accident investigation teams who investigated the same traffic accidents. The results indicated that the accident level variables reported by the police with least reliability were vertical road character, accident severity, and road surface composition. The most reliably reported data were those concerned with the accident location, date, and number of drivers, passengers, and vehicles. The informativeness of the police reports with respect to driver/vehicle characterist@ was practically nil, with the exception of driver age, sex and vehicle model for which the police were correct most of the time (but not errorless). It was afso found that police reports provided very little information regarding the presence of different human conditions and states, vehicle defects and environmental/road deficiencies. The sensitivity of police investigators to all accident causes was low. When causes were categorized into human direct, human indirect (conditions and states) vehicle, and environmental, police were the most reliable with respect to human direct causes and the least reliable with respect to environmental and human indirect causes. Implications for improvement and use of police data are discussed.
Worker education played a crucial role in the development of the trade union movement in South Africa and in the broader struggle for social transformation. This article reviews key moments and dynamics in the trajectory of worker education in South Africa. We argue that international developments, the rise of neoliberalism, and the negotiated compromise between the African National Congress (ANC) and the apartheid state, as well as corporatism resulted in changes to worker education. While the latter as it existed in the past has weakened, the centre of gravity has shifted to community organizations where various forms of learning and creativity continue. Despite the challenges and setbacks of recent years, there remains a significant legacy and influence of the traditions of worker education and militant trade unionism in South Africa, which can and should be drawn upon.
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