What does a pedestrian crossing signal indicate?

Answer: B — It signals pedestrians when it is safe to cross the street

A pedestrian crossing signal is designed specifically to inform pedestrians when it is safe for them to cross the street. This signal typically involves a visual indication, such as a green walking figure or a illuminated symbol, letting pedestrians know that they have the right of way and can proceed safely. When the signal indicates that it is safe, this also means that vehicles should be prepared to yield to the pedestrians in the crossing area. The function of this signal is to promote safety and facilitate the flow of foot traffic at intersections where vehicles and pedestrians intersect. Other options do not correctly capture the purpose of the pedestrian crossing signal. For instance, suggesting that pedestrians can cross at any time disregards the structured nature of crossing signals that are part of traffic control. Additionally, stating that only children can cross is misleading, as the signals apply to all pedestrians, not just a specific demographic.