Glossary of Data Variables for Fatal and accident causation ... - ERSO

Database Glossary Information
understanding any analysis or raw data at face value. This version sits within
the final glossary deliverable between p. 26 and p. 85 inclusive
In-depth Level: The version this deliverable constitutes. In order to fully
understand all aspects of analysis or source data it is essential to have an
understanding of issues beyond the basic variable and option lists that
constitute the glossaries basic level.
Additional information provided in the in-depth version includes supplementary
notes for variables and options plus data input notes for each level and for the
database as a whole. This information is provided in greater detail to that
recorded in the basic version and is therefore more useful when performing or
reviewing any analysis.
Other information included in the in-depth version includes any limitations the
recorded data may have. It is clear that conducting a study across 7 European
countries will highlight areas where the data will differ in terms of availability or
quality, it is equally clear that understanding and using this information is crucial
to allow meaningful analysis to be completed. A complete country by country
breakdown of the limitations of the data is available from p. 16
Another area where additional information is required is in understanding the
restrictions in the data. The restrictions can generally be divided into two distinct
areas, the first relates to the level of data recordable across the 7 countries and
the second concerning the restrictions caused by creating a combined
European dataset and the differences between countries. More information on
this is available on p. 13
1.3 Understanding the glossary
The SafetyNet WP5 glossary is split into 4 sections to reflect the layout of the
database. These sections describe the 4 distinct data groups associated with
road traffic accidents and are labelled as ‘Accident Level’ ‘Vehicle Level’
‘Roadway Level’ and ‘Road user Level’.
The glossary is split into these four distinct sections to allow for easy variable
identification, each variable is assigned a number and level reference in the
form of a letter, the format of this notation is illustrated in Table 1:
Level reference Variable reference Variable title
A 5 Time of day
A 11 Accident Summary
V 15 Vehicle make
V 36 Pre-impact speed
R 54 Speed limit
R 70 Weather conditions
P 80 Impairment
P 92 Ejection
Table 1: Glossary data variable reference system
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