According to Justice lawyers, the invasion of privacy would be minimal in the case of a roadside test in which police officers already have the right to demand several types of information from drivers.

-----

Well isn't that nice.  Just a "little" invasion of privacy.  I thought invasion of privacy was an absolute.  Either you did or you didn't.

You don't mind if I search your car, just a little bit, right?  I just want to make sure you don't have drugs in your car.  I don't think you do, but lets search just in case...ok?

Hey I know, if we just suspend rights altogether, imagine the amount of road safety we could achieve!