You talk like weed just showed up on the scene. Oh and chances are the privately owned plow company drivers and the people in City Hall are high already and have been doing so for years. It's not unheard of for the city "officials and judges" to have a few drinks with their lunch or dinner then decide to take a drive. But nobody blows the whistle on them, do they? Know why? Because there is no other way to catch them other than in the act, there is no residual trace unless they kill or injury some innocent in the process. And just in case you didn't know better, just because the trace of consumption can be found in the body for many many days afterwards doesn't mean the person is still under the influence. Just FYI.