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

Manual For SafetyNet accident causation system (SNACS)
an intersection. In Kalle’s accident however, as he has already seen the
intersection and “knows” that it is green, he also knows that he has the right of
way and that there is no reason not to drive into the intersection. Timing
therefore is a better explanation of the physics of the situation.
Next, we look at Appendix B and locate “Timing: No action” among the
phenotypes, to see which the possible genotypes that are linked to this
phenotype are. The table looks like this:
PHENOTYPES (A)
ANTECEDENTS
(REASONS/CAUSES)
GENERAL Genotypes
Observation missed (B1)
Faulty diagnosis (C1)
Decision error (C3)
Inadequate plan (D1)
Inattention (E6)
Communication failure -
between drivers (J1)
Communication failure -
between driver and
environment (J2)
GENERAL
Phenotypes
(Critical events)
with definitions
Timing (A1)
The regulation of
time for actions to
occur.
CONSEQUENTS (RESULTS/EFFECTS)
SPECIFIC
Phenotypes (with
definitions)
Premature action
(A1.1)
An action started
too early, before a
signal was given or
the required
conditions had
been established.
Late action (A1.2)
An action started
too late.
No action (A1.3)
An action that was
not done at all
(within the time
interval allowed).
Examples for
SPECIFIC
Phenotypes
Performing an
overtake before there
is good visibility.
Starting/stopping too
early at traffic lights.
Dip the lights too early
when driving in the
dark.
Not changing lanes in
time.
Starting an overtake
too late.
Dip the lights too late
when driving in the
dark.
Figure 9: Extract of the phenotype row Timing (A1) from the PHENOTYPES table
in appendix B
To the right in the table is the resulting phenotype (the consequent), and to the
left are the possible genotypes (causes/reasons) that can generate the
phenotype. In other words; if we can establish that any of the genotypes on the
left has taken place, then it is legitimate to infer from this information that the
phenotype Timing (A1) can take place. In the case with Kalle, we know from the
interview that he never saw the traffic light turn red. From this information, we
feel confident saying that the genotype “Observation missed (B1)” has
contributed to the phenotype “Timing: No action” (A1.3). This gives us the start
for a chain of analysis, looking like this:
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