**Professional cyclists and bicycle riders** participating in a competition are governed by **their own rules**. This is because cycling competitions have specific rules that differ from the general traffic regulations that apply to occasional cyclists or other vehicles on public roads.

- In a competition, professional cyclists follow a set of rules designed to ensure the safety and proper conduct of the race. These rules may include aspects such as the formation of cyclists, overtaking conditions, and specific safety measures.

- General traffic regulations, such as those regulating the use of the shoulder or right of way, do not apply in the same way in a competition context. For example, in a race, cyclists may occupy the entire roadway and are not required to ride in a line or on the shoulder, as is required in normal situations.

Therefore, it is important to understand that cycling competitions have their own regulatory framework that adapts to the needs and characteristics of this type of event.