what computer bus is sometimes called a "traffic cop"
The computer bus that is sometimes referred to as a "traffic cop" is the input/output (I/O) bus. It is responsible for coordinating the communication between the computer's central processing unit (CPU) and all other peripheral devices such as keyboards, mice, printers, and hard drives. The I/O bus acts as a mediator, allowing data to flow between the CPU and the various peripherals.
To find this answer on your own, you could start by understanding the different types of computer buses. The three main types are the system bus, which connects the CPU to main memory (RAM); the I/O bus, which connects the CPU to peripheral devices; and the expansion bus, which allows for the attachment of expansion cards (such as graphics cards or network cards).
Once you have an understanding of the different types of computer buses, you can research the role of each bus and identify which one acts as a "traffic cop." In this case, you would discover that it is the I/O bus.