Keith Vodden Dr. Douglas Smith - Transports Canada

Ontario Model
Step 3
Allocate additional injuries based on proportion of demolished vehicles
Collision Severity
Fatal Injury PDO
Injuries:
Major 50 100
Minor 70 150
Minimal 60 125
Additional injuries:
Major 100
Minor 200
Minimal 50
Vehicles damaged:
Demolished 10 50 40
Injuries:
Major 50 + 10 100 + 50 0 + 40
Minor 70 + 20 150 + 100 0 + 80
Minimal 60 + 5 125 + 25 0 + 20
Injuries:
Major 60 150 40
Minor 90 250 80
Minimal 65 150 20
We use the characteristics of fatal collisions 1 to move an appropriate number of
collisions with the same characteristics from the injury collision severity group to the
fatal severity group. This is illustrated in the hypothetical example provided below.
In this example, the average fatal collision has the following characteristics–1
fatality, 3 injuries and 10 vehicles involved. There are 3 fatalities assigned to injury
collisions after the adjustments noted earlier. Assuming the collisions, involving the 3
fatalities, but listed as injury collisions are like other fatal collisions, allows us to identify
3 collisions, with 3 fatalities, 9 injuries and 30 vehicles involved among injury collisions.
Transferring these collisions from injury to fatal collisions would increase fatal collisions
1 Each fatal collision includes 1.11 fatality, 0.44 major injury, 2.16 minor injury, 1.33 minimal injury and
involves the following vehicles by damage level: 0.99 demolished, 0.27 severe, 0.21 moderate, 0.18 light
and 0.07 none.
TNS Canadian Facts, Social and Policy Research 21