Download PUB LDS 931 SaferBraIn_D3.4 Decision support system

SB-CTL-WP3_D3.4
Grant Agreement n°233994
It is important to ensure that the DSS enables the end user to input details about factors
which contributed to the accident(s) occurring. A form which contains a number of drop-down
list of contributory factors details should be provided and should be linked to the road user
who actions/behaviours were affected by these factors. The list should include factors related
to the road user themselves (human), their surrounding road environment, and the vehicle
they were travelling in (if appropriate). It is proposed that the list of factors should be based
on the list of contributory factors developed as part of the EC funded TRACE project (Naing
et al., 2005). Table 4-3 Suggested variables and input levels for the ‘Contributory Factors’ form
gives further details about the types of data that end-users would be asked to input under
‘Contributory factors’.
Table 4-3 Suggested variables and input levels for the ‘Contributory Factors’ form
Level 1 variables
Level 2 – options in drop
down menus
User state
Human
Experience
Behaviour
Road environment
Road condition
Road geometry
Traffic condition
Visibility impaired
Level 3 – further options in
drop down menus
Physical / Physiological
Psycho-physiological
Internal conditioning of
performed task
Little/None
Over-experienced
Conflicting (distraction)
Risk taking
Further drop down menus with
levels of detail if required
Traffic guidance
Other environmental factors
Electro-mechanical
Vehicle
Maintenance
Design
Load
Further drop down menus with
levels of detail if required
For each road user identified as having an active involvement in the crash and a “Road User
Details” form has been created, a link to the “Contributory Factors” form will be available on
the “Road User details” form. The end user will then be able to select known factors which
likely contributed to that specific road user being involved in the accident. There will also
need to be a ‘new record’ option on this page to enable the end-user to start a new, blank,
“accident details” form so that they can enter new a new accident record at the same road
location, and so start the process again if required.
In PCA, the contributory factors for the accidents are provided in term of Crash Patterns.
Basing on the accident data included in the database, the software automatically provides
the list of Crash Patterns registered in the database for the site selected for the analysis (see
Figure 4-6).
March 2011
Page 36 of 87
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