Our testing regime is supposed to be—and it's hard to educate our members not to do this—a general deterrence model. If they see someone they believe is driving impaired, they are supposed to do an impaired driver test similar to your sobriety test. What many of them do is just go straight to these tests, because it's quicker and easier.
The benefit of doing a sobriety test is that if they fail it, they then have to get blood off them and we get absolute analysis of what type of drug and the level of drug. It doesn't happen that often. I'd like it to happen more.
Now that they have this bit of equipment, our members default to it because it's quite easy and quick to use. The sobriety test takes up to an hour and a half, by the time you end up getting a nurse out to take the blood.