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

Manual for SafetyNet accident causation system (SNACS) - Appendices
Driver
conditions
Visibility –
obstructing
elements
Physical and
mental
health
Speed
(compared to
signs)
Time of day
and week
Number of
simultaneou
s goals
Did the driver have a clear line
of sight towards important
objects, or was visibility
deteriorated by A-pillars,
shrubberies or other objects
Were there any blind spots
which influenced the event
Aspects which vary from time
to time can be considered. For
instance, low blood sugar
because one hasn't had
something to eat for a long
time.
In what condition was the
driver
Healthy or not so healthy
Was the driver driving within
the speed limit or was he/she
driving too fast or slow How
much faster or slower
It is a well-known
psychological phenomenon
that when one performs
activities outside of the normal
diurnal rhythm (during the time
when one is normally asleep)
performance is deteriorated.
This is also known as
circadian rhythm.
How many tasks did the driver
have to perform in order to
handle the traffic situation,
including handling the vehicle
E.g., looking for a petrol
station, looking for an exit,
Optimal (+)
Good (0)
Tolerable (0)
Poor (-)
Good (0)
Poor (-)
50 km/h or less (+)
70 km/h (0)
90 km/h or more (-)
Within diurnal rhythm
(+)
Very early or very
late (0)
Outside diurnal
rhythm (-)
Fewer than capacity
(+)
Matching capacity (0)
More than capacity (-
)
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