Some observations on theory and methodology in safety research.

When traffic safety theory and methodology are considered there are 3 issues which call attention ( 1) That there are limited studies that use results from one type of safety methodology to enhance other methodologies (2) Theory and concept should be directly considered before statistical models are used and (3) Survival theory is proposed as an example of a statistical technique that is consistent with the earlier conceptual structure and allows the exploration of a wide range of the factors that contribute to highway operating risk.