Abstract
This report is the third part of a four-part study in preparation of research into the relationship between driving speeds and road safety. The report mainly offers an overview of the applicable research methods. The various methodologies are judged on: (1) their relevance to certain problem definition types; (2) their relative contribution to the knowledge already available; and (3) on the effort required for their implementation. The report concludes with a discussion of both practical and more fundamental considerations. The aim is to enable to make concrete choices from the research alternatives described. See also IRRD 868891 (C 3153), 868892 (C 3154), and 868894 (C 3156).