Improving highway safety through speed management

据世界卫生组织（世卫组织）称，世界范围内的交通碰撞每年造成120万人死亡。预计到2020年，道路交通伤害将成为造成全球疾病负担的第三大因素。交通碰撞除了造成社会痛苦和痛苦外，还造成了巨大的经济成本。2004年，加拿大因交通碰撞造成的社会成本估计为627亿元。尽管自20世纪70年代以来，发达国家的交通安全状况不断改善，但数据显示，在过去十年中，死亡人数相对持平。加拿大也不例外，在2000年以前，死亡人数一直在稳步下降。另一方面，自2000年以来，与交通有关的死亡人数一直在2004年最低2,430人和2006年最高2,610人之间波动。

According to the World Health Organization (WHO), worldwide traffic collisions cause the death of 1.2 million people every year. By 2020, road traffic injuries are predicted to become the third largest contributor to the global burden of disease. In addition to the social pain and suffering they produce, traffic collisions cause significant economic costs. Social costs resulting from traffic collisions in Canada in 2004 were estimated at $62.7 billion. While continuous improvements in traffic safety have been recorded in the developed countries since 1970's, data show that the numbers of fatalities have relatively flattened over the past decade. Canada is no exception, where the number of fatalities had steadily decreased over time until the year 2000. On the other hand, the number of traffic related fatalities since 2000 has been fluctuating between a minimum of 2,430 in 2004 and a maximum of 2,610 in 2006.