What is the primary function of a bicycle's bell or horn?

The primary function of a bicycle's bell or horn is to signal presence to pedestrians and other road users. This tool serves as an important safety feature, allowing cyclists to communicate their presence, intentions, and upcoming maneuvers. By using a bell or horn, cyclists can warn pedestrians, especially in crowded areas or when approaching from behind, thereby helping to prevent accidents and ensuring a safer riding environment for everyone.

In contrast, entertaining others while riding may be a side benefit of using a bell or horn, but it is not its intended purpose. Alerting cyclists to mechanical issues is typically achieved through visual inspections or other maintenance tools, not a bell or horn. Measuring speed while riding is done through different devices, such as cycle computers, rather than through auditory signals. Thus, the bell or horn plays a crucial role in enhancing situational awareness and promoting safe interactions within the cycling community and with others on the road.