The random roadside drug testing does take a considerably longer time than the random breath testing. In the case of random breath testing, drivers are really only detained for 30 seconds to a minute, let's say.
In the case of the roadside drug testing, there's an initial saliva test done. I believe that takes about five to 10 minutes. If that's positive, the drivers are then taken to a bus, where they are given a second oral test, which takes about another 15 minutes. The overall process for testing is a longer process.
In addition, the random roadside drug testing is quite a lot more expensive than random breath testing. For example, in the case of breath testing, once you've invested in the preliminary breath-test kit, the ongoing costs are really just the cost of the tube into which the driver blows. In the case of the random roadside drug testing, the saliva tests are more expensive. I believe they're in the order of $30 each. I'd suggest that you ask that question of my colleague from Victoria, who I believe will be talking to you.
The upshot of this is that in Australia nowhere near the number of drug tests are performed at the roadside as compared to breath tests. As a result, there does tend to be more targeting of that activity. It tends to be focused more towards recreational users, and also towards truck drivers, and that is because of their use of methamphetamines for staying awake whilst driving. In other words, the drug testing tends to occur more at particular times, and particularly late at night, in areas where recreational drug users or truck drivers might be.
The overall upshot of this is that in terms of the very strong boots-and-all effect that was obtained for breath testing in Australia, it's been difficult to achieve that for the drug testing. From a resourcing point of view, the police have needed to allocate additional resources to cover the higher costs of the saliva drug tests. This really requires a specific allocation of budgets to the police for them to be able to do additional drug testing, in order to maintain the breath testing at the current levels.