Publication Details

Data collection and in-service evaluation issues

Type: article

Author(s): Hunter, William W.

Pages: 30-39

Url: https://onlinepubs.trb.org/Onlinepubs/trcircular/416/416-005.pdf

Publication Date: Oct-1993

Journal: Transportation Research Circular

Volume: 416

Abstract: When considering the elements of a roadside safety management system, appropriate data about system components are an important ingredient. Only with such data can in-service evaluation be performed. This paper discusses inherent problems with crash evaluations. Topics addressed include building the data base, manual methods, photologging, videologging, automated and semi-automated methods, weighting schemes, and a pictorial rating scale. This is followed by a discussion of in-service evaluation issues. Attention is focused on the problem of deciding what to measure, threats to the validity of evaluations, some common evaluation designs, and ways safety management systems might be used to fill gaps in knowledge.