What type of sign alerts drivers about merging vehicles?

A merging traffic sign is specifically designed to alert drivers about the potential for vehicles to merge into their lane from another roadway or lane. This sign typically features an icon of two lanes converging, indicating to drivers that they should be cautious and prepared for other vehicles merging. Such signs are crucial for maintaining safety and ensuring smooth traffic flow, particularly in areas where drivers may not expect to encounter additional vehicles entering their path.

In contrast, a stop sign is used to instruct drivers to come to a complete stop at an intersection, while a left turn sign indicates that a left turn is permitted or required at a particular intersection. An exit sign, on the other hand, provides information about an upcoming exit from a highway or road but does not convey any information regarding merging traffic. Thus, the merging traffic sign is the most appropriate choice for indicating the presence of vehicles that may enter a driver's lane unexpectedly.