Every call to 999 is, by definition, an emergency. The uncertainty is much like the Schrödinger's Cat thought experiment: until verified it both is and isn't an emergency but must be treated as one until proven to be the other because there's a human life at stake. From the time our heroes are dispatched until the time they arrive, it's an emergency and they are therefore justified in using all means necessary to arrive, including speeding, driving on the wrong side of the road, driving on shoulders, running red lights, taking priority over road usage. We already allow this. Anyone callous and selfish enough to impede emergency workers, -- many who risk their lives trying to save others -- deserves the full contempt of society. By putting his own convenience and whim before the health and safety of others, a person necessarily sacrifices his own welfare to the whim of others. Somewhat Hammurabic stuff, I concede, but our laws often deny the rights of those who would deny the rights of others. My idea is only a logical extension of this.