Why imagine? Police cars, ambulances and fire engines already are exempt from speed limits. But only if they actually are rushing to an emergency with lights and horns on. They are also allowed to go through red traffic lights.
Except at night to not wake you up they might not have the horn blaring then. But they also understand how much faster to go, when to have the horn enabled even at night, know to approach a red light slowly even if they have right of way and you are supposed to let them pass etc.
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Why imagine? Police cars, ambulances and fire engines already are exempt from speed limits. But only if they actually are rushing to an emergency with lights and horns on. They are also allowed to go through red traffic lights.
Except at night to not wake you up they might not have the horn blaring then. But they also understand how much faster to go, when to have the horn enabled even at night, know to approach a red light slowly even if they have right of way and you are supposed to let them pass etc.