Final answer:
Traffic signs have more than two colors, each with distinct meanings essential for road safety and traffic management. The color yellow is commonly used on caution signs to indicate that drivers should be cautious or slow down. Both colors are important in their own right and play a crucial role in ensuring road safety.
Step-by-step explanation:
The statement that traffic signs serve to keep all drivers safe is indeed true. However, the claim that there are only two colors for traffic signs is false. Traffic signs come in various colors with different meanings. For instance, red often means 'stop' or indicates a prohibition, yellow usually signals caution or advises of potential hazards ahead, and green indicates permission or directs movement. Colors such as orange and neon green are used for caution signs or uniforms because they are highly visible in various light conditions. Interpreting road signs correctly is crucial for the safety and management of traffic, as they provide essential information and help prevent accidents at problematic intersections.