What do yellow signs typically signal?

Answer: B — Warnings

Yellow signs serve as warning indicators on the road. They are designed to alert drivers to potential hazards or changes in road conditions ahead. This could include situations like sharp turns, road construction, or the presence of wildlife. The use of yellow is universally understood as a cautionary color, prompting drivers to slow down and be vigilant. In contrast, pedestrian crossings would typically be marked by other colors, such as fluorescent yellow-green. Directional signs often utilize blue or green, while service signs are usually also blue. This differentiation helps drivers quickly identify the nature of the sign and respond accordingly, reinforcing the importance of yellow signs as crucial warnings during their driving experience.