B11 is a designation that can refer to various things depending on the context. In the realm of transportation, it may refer to a specific bus route or a highway designation in certain countries. In other contexts, B11 could denote a type of product, model, or even a classification in a particular industry. In the field of science, B11 is often associated with the chemical element Boron, which has an atomic number of 5. Boron is used in various applications, including glass and ceramics production, as well as in fertilizers. The term B11 may also appear in discussions about B11 vitamins, which are essential for human health.