Car horns are used for a variety of purposes, not least among these safety.
Mumbai, India is crowded and noisy. It should be, after all. It's the wealthiest and most populous city in India and the fifth largest city by population on the planet. This cocktail of demographics results in one big problem - traffic. While simply getting around can be tough enough, Indian drivers have developed the unfortunate habit of honking their horns. Often. At all hours of the day. And then at night. All the time.