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The remainder of this chapter is organised as follows. In the next section, the data used in this
research and the estimation model are presented. The results are discussed in Section 3.3, and
the last section provides some concluding remarks.
3.2 Methods
3.2.1 Data
The primary data used in this study were provided by VicRoads and contained information
on all police-reported collisions in Victoria, Australia. The data provided included
information on environmental, temporal, road user, road and vehicle characteristics. In
addition, information on traffic volumes and road features (e.g. road division markings) was
extracted from the Australian Urban Research Infrastructure Network Portal (AURIN). The
variables used in estimating the final model are summarized in Table 3.1.
Table 3.1: Summary of variables included in models
Variables Mid-Block Intersection
Categorical Variables
Vehicle manoeuvre prior to crash
Going straight (reference) 75.6 40.7
Turn left 4.0 25.7
Turn right 3.3 22.5
Others/Not known 17.2 11.1
Collision classification
Run-off-road (reference) 49.5 36.0
Angle 16.5 41.1
Others 34.0 22.9
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