Keith Vodden Dr. Douglas Smith - Transports Canada

VI
CANADIAN JURISDICTIONS MODEL AND SOCIAL COSTS
This chapter describes the modeling and estimation of social costs of motor
vehicle collisions in all Canadian jurisdictions and for Canada in total.
A. RAW DATA AND REVISIONS
Raw data on motor vehicle collisions in 2004 for each jurisdiction were obtained
from the Traffic Accident Information Database (TRAID) of Transport Canada. Exhibit
VI-1 presents the data for 2004.
Some of these data are not recorded in a manner consistent with the data used by
the Ontario model. As a result we revised the data to reflect the format of the Ontario data
as follows:
• For Newfoundland and Labrador we estimated minimal injuries based on data for
other injury categories for Newfoundland and proportions for Ontario across
injury categories.
• For Prince Edward Island, Manitoba, Saskatchewan, Nunavut, Northwest
Territories and Yukon, vehicles listed as “Towed Away” were assigned to the
“Severe” damage category.
• For Newfoundland and Labrador, Nova Scotia, New Brunswick, Quebec, and
Alberta, we distributed missing vehicle damage by collision severity based on
proportions for Ontario.
• For Quebec and Alberta we estimated missing minimal and minor injury
categories based on data for other injury categories and proportions from Ontario.
• For unknown injury severity categories for Manitoba, Nunavut, Northwest
Territories and Yukon we redistributed the number of unknown based on
proportions for available categories.
Results of the revisions in the raw data for each jurisdiction are presented in
Exhibit VI-2.
TNS Canadian Facts, Social and Policy Research 69