What is the emblem that identifies vehicles traveling at speeds of 25 mph or less?

The emblem that identifies vehicles traveling at speeds of 25 mph or less is a fluorescent orange triangle with retroreflective borders. This specific design is intentionally bright and highly visible, which helps ensure that other drivers can easily recognize and distinguish these slower-moving vehicles on the road. The use of an orange color is important as it is associated with caution and alerts drivers to be aware of potential hazards ahead. The retroreflective borders enhance visibility, especially in low-light conditions, making it a crucial safety feature for such vehicles, which may include farm equipment and other slow-moving vehicles.

The other options do not fulfill this purpose as effectively. For example, the blue square typically indicates parking spaces, while the red circle with a diagonal line signifies a prohibition, such as no entry. The green rectangle is generally used for directional signage or information, rather than indicating vehicle speed limitations or warnings.