Samenvatting
The National Accident Sampling System (NASS) has grown from a pilot data collection system with 10 teams in 1978 to the current system of 50 teams using over 130 accident data researchers in 27 states. At the end of 1984, there were over 45000 cases in the NASS files with each case including approximately 400 different data elements. The overall goals of NASS are to create and maintain a network of collection teams that use specific operational procedures to assure consistent, validity, and reliability of the resultant data file.