No Passing zones are designated for safety reasons, and it is illegal to pass another car in these areas. You could receive a hefty fine and, in some cases, even jail time, if you are caught illegally passing in a No Passing zone.
If you need to pass another car, wait until you reach a designated passing zone or a stretch of road where passing is permitted. It is not worth putting yourself and others at risk by attempting to pass in a No Passing zone.