What is bus d8?

As an AI language model, I cannot find enough context to provide a specific answer about "bus d8". However, "D8" may refer to various types of buses, depending on the context and region. For instance, in the United Kingdom, D8 is a double-decker bus manufactured by Alexander Dennis. In Pakistan, D8 may refer to a type of intercity bus that runs between Lahore and Islamabad. In India, D8 may also refer to a type of bus that is commonly used for public transportation in cities like Delhi and Kolkata. Hence, without additional information, it is difficult to provide a precise answer to what "bus d8" implies.