What aspect of signal systems is critical for pedestrian safety?

The visibility and clarity of signals are paramount for pedestrian safety because they ensure that both pedestrians and drivers can easily see and understand the signals. Well illuminated and clearly marked signals help convey critical information, such as when it is safe to cross, and they reduce confusion at intersections. When signals are visibly distinguished, especially in various weather conditions or at night, the likelihood of misinterpretation is minimized, which can help prevent accidents.

While other choices contribute to improving traffic flow or enhancing visibility in specific situations, the fundamental purpose of signals is to provide clear communication regarding pedestrian right-of-way. If signals are not visible or are difficult to understand, pedestrians may not be aware of their crossing options, increasing the risk of accidents. Thus, ensuring that signals are visible and clear is a critical component of pedestrian safety in any traffic management context.