Google being what it is these days, I’m finding it difficult to track down the study that was performed a decade after British Columbia reduced the BAC limit and instituted severe penalties for DWI offences, so you’ll have to trust me when I say that there was a significant and long-lasting reduction in DWI cases and automobile accident rates.

Our BAC limit is 0.05, except for new drivers, where it is 0.0.

http://www.dui.ca/bc.php