One-way direction refers to a system where movement is permitted in only one specified direction. This concept is commonly seen in traffic management, where one-way streets are designed to improve flow and reduce accidents by preventing vehicles from traveling against the designated path. In broader contexts, one-way direction can apply to communication or processes that only allow information or actions to proceed in a single direction. For example, in data transmission, one-way communication ensures that signals are sent from a sender to a receiver without the possibility of feedback or return messages.