http://www.vancouversun.com/news/Tough+laws+aimed+drinking+drivers/2959851/story.html

Things tend to get more difficult for criminal lawyers and their clients as time goes by. As seen above, provinces are increasingly exercising their jurisdiction over highway safety by limiting permissable levels of blood alcohol. Given this trend and the availability of alcohol detection ignition devices it seems only a question of time before all cars are equipped with mechanisms which prevent them from being started by drivers having more than a minimum amount of blood alcohol.