The "Yellow Line" typically refers to a safety marking found on roads and pathways. It is used to indicate the separation of traffic lanes, guiding drivers to stay in their designated lanes. In many regions, a solid yellow line means no passing, while a broken yellow line allows for overtaking when safe. In public transportation, the "Yellow Line" can also refer to specific subway or train routes. For example, in cities like Washington, D.C., the Washington Metro system features a Yellow Line that connects various neighborhoods and key locations, facilitating easy travel for commuters and visitors.