The volume presents information on inaccuracies in existing sources of highway accident data, on methods for correcting these inaccuracies, and on methods for improving accident injury data by use of hospital records. The major error in existing accident data is bias due to under-reporting; this is due to lenient criteria and policies for reporting of accidents. There is a lack of uniformity in non-reporting among states. In a study of the accuracy of police injury codes, it was found that very low percentages of really severe injuries actually occurred in cases with severe-injury police codes. It was determined that corrections in accident-frequency totals may be accomplished by extrapolations of reported totals, using ratios of non-reporting derived from sample comparisons between official records and driver surveys. Also, available national summaries of hospital records could be used to improve estimates of the number and severity of accident injuries. (Author)
Acquisition of Information on Exposure and on Non-Fatal Crashes. Volume II - Accident Data Inaccuracies
1971
88 pages
Report
Keine Angabe
Englisch