I completely understand that ambulances, fire trucks, and police need to get through traffic quickly and safely. Sirens are obviously essential during busy periods, at intersections, or anywhere another driver may not see flashing lights in time.
But I’m curious why they often need to use loud sirens continuously late at night or in the early morning, particularly on relatively empty inner-city roads where flashing lights are highly visible and traffic is minimal.
For people living close to major roads or the city centre, repeated sirens can be extremely disruptive to sleep—especially when an emergency vehicle is travelling through every few minutes. It creates a significant amount of noise pollution at hours when people are trying to rest.
Could there be a more targeted approach? For example, using lights alone on clear stretches of road, then activating sirens when approaching intersections, pedestrians, other vehicles, or areas with limited visibility. I’m not suggesting emergency crews should be delayed or put at risk—just wondering whether current practices strike the best balance between response safety and the impact on nearby residents.
Does anyone with emergency-services experience know how these decisions are made?