Traffic noise is a common sound in urban areas, and is made up of a variety of noises. TOOT, HORNS, BEEP, HONKS, and TOOTS are all words used to describe the sounds of traffic noise. TOOT is a short, sharp sound, usually made by a car horn or a whistle. HORNS are longer, louder sounds, often made by larger vehicles such as trucks or buses. BEEP is a short, high-pitched sound, usually made by smaller vehicles such as cars or motorcycles. HONKS are similar to HORNS, but are usually lower in pitch. Finally, TOOTS are short, repeated sounds, often made by a train or a boat. All of these sounds together make up the sound of traffic noise.