An outline of a triangle painted in the lane before the place you must yield is a...?

The outline of a triangle painted in the lane before the place where you must yield is known as a yield line. This marking serves to inform drivers that they are approaching a yield area, indicating that they must prepare to slow down and yield to any oncoming traffic or pedestrians. The triangular shape is specifically designed to capture attention and signal the necessity to yield. Recognizing this symbol can help ensure safer driving behaviors at intersections and merging areas.

In the context of roadway markings, the yield line is crucial for preventing accidents by clearly communicating the driver's obligation to yield, thereby regulating the flow of traffic. Understanding this marking helps drivers respond appropriately when entering an intersection or a yield situation, contributing to overall traffic safety.