(2006 Urban Thresholds)
(Note the feet behind the sign - can't be ours we had fluro vests and that sign is a hazard in itself)
From there is was the analysis of the interview notes, the questionnaire, the field work and finally the report.
I remember doing one of the Safety Management Systems surveys (RSS9) where all was in order in the office, nice manuals on shelves, well motivated team but what turned out to be limited connection during an informal field survey.
A pretty good example of this can still be seen everywhere and that is vegetation growing over road signs (RSS 19). This issue came up as a problem way back in 1985 when the first crash reduction studies were done.