Citation

Mahalel D. Transp. Res. Rec. 1986; 1068: 85-89.

Copyright

(Copyright © 1986, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

The use of accident rates as risk estimators, though widespread, presents a potential error. This may occur when the relationship between exposure and accidents is not linear (i.e., a decreasing derivative); then, an increase in exposure might be misinterpreted as leading to a decrease in accident risk. To obviate such error, a definition of risk as a triplet of exposure, accidents, and probability is presented. Accordingly, the risk level of a system can only be expressed in relation to a specific exposure level. The definition of exposure resulting from this definition of risk is simply any traffic situation from which the number of accidents can be estimated.

Record URL:
http://onlinepubs.trb.org/Onlinepubs/trr/1986/1068/1068-011.pdf

Language: en

Keywords

MOTOR TRANSPORTATION - Traffic Control; RISK STUDIES; PROBABILITY - Estimation