STATISTICAL TEST OF DIFFERENCE BETWEEN EXPECTED ACCIDENT FREQUENCIES
A primer on the testing of some common statistical hypotheses in road safety is presented. The basic notions of statistical hypothesis testing are reviewed and applied to the specific circumstance when one wishes to test a statistical hypothesis about a change in the expected accident frequency beyond what is the result of a change in traffic and similar influences. The hope is that this exposition will illumine the meaning and intricacy of such tests, inform the decision about when such tests are called for, help users choose the right significance or power, and, because software is now available, improve practice in this matter. A companion paper on the detection of deterioration in safety makes use of the foundation provided.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309059135
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1542, Statistical Methods and Accident Analysis for Highway and Traffic Safety.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Hauer, E
- Publication Date: 1996
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 24-29
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Serial:
- Transportation Research Record
- Issue Number: 1542
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Crash rates; Crash risk forecasting; Defects; Detection and identification; Detectors; Highway safety; Hypothesis testing; Safety
- Old TRIS Terms: Expected accident frequencies; Safety deterioration
- Subject Areas: Data and Information Technology; Highways; Safety and Human Factors; I81: Accident Statistics;
Filing Info
- Accession Number: 00728423
- Record Type: Publication
- ISBN: 0309059135
- Files: TRIS, TRB
- Created Date: Nov 13 1996 12:00AM