More detail on the model’s component parts and social cost findings can be found in separate chapters devoted to the models of the social costs of motor vehicle collisions for: Ontario; sub-sets of collisions in Ontario; Canadian jurisdictions; and individuals covered by the WS&IB as well as in Appendices. [...] Ontario Model • Collisions where one or more of the vehicles involved was a large truck1 represent 7% of all collisions, 18% of fatal collisions and 15% ($2.7 billion) of the social costs of collision in Ontario in 2004. [...] These are adjusted to reflect cases of under- reporting and misreporting and to add other impacts of the collision, such as use of police 1 The high and low estimates are based on alternate willingness-to-pay estimates for the value of statistical life available in the literature. [...] Next the social costs of collisions were estimated based on the characteristics of the collisions in each jurisdiction using parameters established in the Ontario model (in C3— Social costs). [...] However, given the age of the study one of the adjustments we make is to reflect the changed mix of injuries from motor vehicle collision in 2004 compared to 1990.