How to assess reliability and validity of a trafficconflict technique?

Author(s)
Ambros, J.
Year
Abstract

In order to develop an operational traffic conflict technique for local road safety assessments, reliability and validity should be tested. At ICTCT2011 and 2012 workshops, recent activities in the Czech Republic have been presented, aimed at developing a unified traffic conflict technique (TCT) applicable in Czech conditions. The two key properties of every safety indicator are reliability and validity. Therefore various practical ways to assess them in the Czech environment have been sought. Reliability may be tested as an internal consistency of observers (inter-reliability) or external consistency (intra-reliability). Validity may be evaluated as process or product validity. However, accident frequency, which has been traditionally used as a validity criterion, has been known to suffer from a number of biases; therefore alternative validity criteria are discussed, such as the probability of encounter or frequency of critical events in simulation studies. Preliminary experience is summarized and practical conclusions related to observers reliability and results validity are drawn. This publication may be accessed by Internet users at: http://www.ictct.org/workshop.php?workshop_nr=35

Request publication

9 + 11 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

Publication

Library number
20130304 cc ST (In: ST 20130304 [electronic version only])
Source

In: Road safety in a globalised and more sustainable world : current issues and future challenges : papers and presentations presented at the 25th workshop of the International Cooperation on Theories and Concepts in Traffic Safety ICTCT, Hasselt, Belgium, October 8-9, 2012, Pp.

Our collection

This publication is one of our other publications, and part of our extensive collection of road safety literature, that also includes the SWOV publications.