00985893

Component

https://doi.org/10.3141/1897-05

http://scholar.google.com...hoof&publication_year=2004

In Flanders, Belgium, approximately 1,014 accident locations are considered dangerous. These dangerous accident sites, or black spots, are selected by means of historic accident records for the period 1997 to 1999. A combination of weighting values, respectively, 1 for each light injury, 3 for each serious injury, and 5 for each deadly injury (1_3_5), is used to rank and select the most dangerous accident locations. A sensitivity analysis was performed to investigate the effect on the identification and ranking of black spots as based on three different weighting value combinations, representing a different attitude toward the traffic safety problem: avoiding all accidents (1_1_1), all deadly accidents (1_1_10), and all accidents with serious or deadly injuries (1_10_10). Furthermore, effects of use of the expected number of accidents, estimated from a hierarchical Bayesian model, instead of the historic count data, to rank and select the accidents sites, were evaluated. Results show that a different attitude toward the traffic safety problem and the choice of the corresponding injury weighting values on the one hand and use of estimates instead of count values on the other hand do have important consequences for the selection and ranking of black spots. This is important not only for the number of accident locations that will receive a different ranking order but also for the effect on the type of accident locations that are selected as dangerous and accordingly for the resulting future traffic safety decisions.

This paper appears in Transportation Research Record No. 1897, Statistical Methods and Safety Data Analysis and Evaluation.

00985888

English

p. 34-42

2004

Transportation Research Record

030909495X

References (31) ; Tables (6)

Decision making; Future; High risk locations; Ranking (Statistics); Sensitivity analysis

Identification

Flanders (Belgium)

Data and Information Technology; Highways; Safety and Human Factors; I81: Accident Statistics

TRIS, TRB, ATRI

Feb 11 2005 12:00AM

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