What does the letter 'B' in the display code stand for?

The letter 'B' in the display code typically stands for "Bus." In the context of Amtrak's operations, this designation is used to indicate services that involve bus transportation, which can complement train services, particularly in regions where train service may not be direct or fully available. When understanding display codes, it is essential to recognize that these acronyms provide quick references to the types of services provided, enhancing operational efficiency and communication with passengers. Knowing that 'B' is specifically associated with bus services helps in interpreting travel itineraries and understanding the connectivity between different modes of travel.