Mr. Yost will finish.
The random breath testing and roadblocks are very important tools. Whether the random breath testing would be done at a provincial level or under the Criminal Code, it could be a very helpful tool for police, because then drivers would think that at any time, anywhere, they could be pulled over and possibly asked for a breath test. Currently, with respect to deterrence, if I'm an individual who is a drunk driver and I repeatedly drive drunk...the statistics from the Traffic Injury Research Foundation tell us that something in the order of 3% to 5% of drinking drivers commit 84% of the drinking and driving offences. So a small percentage of drinking drivers repeatedly behave this way and account for the vast majority of drinking and driving offences situations. Why do these people continue to do that? Because they are aware that out of 200 impaired driving trips, they will be detected on an average of one occasion in Canada. That's an optimistic estimate.
So if I know that last Friday night I was driving home drunk from the bar and I wasn't caught and I didn't get into an accident, am I going to drive home tonight on a Friday after I've been drinking and I feel less impaired than I did last Friday, when I made it home and the police didn't stop me? The behaviour of individuals who are drinking and driving repeatedly is reinforced, because they are not necessarily stopped or detected by the police officers who might not even smell alcohol and give them a test, or they just make it home without being stopped. That's a beginning to an answer. I'm sure Mr. Yost will have something further for you.