the influence of motor vehicle legislation on injury claim incidence background although there have been numerous strategies to prevent motor vehicle collisions and their subsequent injuries few have been effective in preventing motor vehicle injury claims in this paper we examine the role of legislation and compensation system in altering injury claim incidencemethods the population base for our natural experiment was all saskatchewan manitoba british columbia and quebec residents who submitted personal injury claims to their respective motor vehicle insurance provider from 1990 to 1999 the provinces of saskatchewan and manitoba switched from tort to pure nofault insurance on january 1 1995 and on march 1 1994 respectively british columbia maintained tort insurance and quebec maintained pure nofault insurance throughout the entire 10year periodresults the conversion from tort insurance to pure nofault motor vehicle insurance resulted in a fiveyear 31 rr 069 95 ci 068070 reduction in total injury claims per 100000 residents in saskatchewan and a fiveyear 43 rr 057 95 ci 056058 reduction in manitoba at the same time the province of british columbia retained tort insurance and had a fiveyear 5 reduction rr 095 95 ci 094099 quebec which retained pure nofault throughout the entire 10year period had less than one third of the injury claims per 100000 residents than the tort province of british columbiainterpretation the conversion from tort to pure nofault legislation has a large influence in reducing motor vehicle injury claim incidence in canada legislative system and injury compensation scheme have an observable impact on injury claim incidence and can therefore have significant impact on the health care system