What is the purpose of a railroad sign or signal?

The purpose of a railroad sign or signal is primarily to notify traffic of railroad tracks. These signs and signals are crucial for ensuring the safety of both vehicular traffic and train operations. They alert drivers and pedestrians to the presence of nearby tracks, indicating when a train may be approaching and the need for caution. This notification is vital, as trains often travel at high speeds and may not be able to stop quickly.

While speed limits and parking rules are significant traffic management aspects, they are not the primary focus of railroad signage. Similarly, marking pedestrian crossings is important for safety but is covered under different regulations and signage. Railroad signals specifically convey information related to rail safety, making their role in traffic management unique and critical.