Final answer:
Yield Signs are red and white and instruct drivers to slow or stop at intersections, giving way to traffic and pedestrians. Regulation signs communicate rules and prohibited actions. Warning and Railroad Crossing signs are typically yellow and alert drivers to various risks, including upcoming train tracks where vehicles, especially buses and trucks, must be ready to stop.
Step-by-step explanation:
The Yield Sign is typically red and white and signifies that drivers must slow down as they approach the intersection. Drivers should look and yield right-of-way to vehicles and pedestrians in or approaching the intersection. A full stop at a Yield sign is mandatory if traffic conditions require it for safety. Other Regulation Signs, which are often white and black, provide instructions or rules; some may have a red circle with a line through it, indicating that an action is prohibited or that certain vehicles are restricted. Rectangular signs with specific colors and symbols signify special rules.
Warning Signs are generally yellow and alert drivers that they are approaching a hazardous location or a place where caution is needed. These signs may include a secondary sign indicating a recommended speed to enhance safety, particularly where the conditions are potentially dangerous. Finally, the Railroad Crossing Warning Sign is typically yellow with a black 'X' symbol and may include additional signage indicating to 'stop' when appropriate. It signals that a railroad crossing is ahead, and drivers must be prepared to stop; buses and some trucks have a legal requirement to stop at railroad crossings.