Which of the following is true regarding pedestrian signals?

Pedestrian signals play a crucial role in ensuring the safety of individuals crossing the street. When a pedestrian signal indicates a 'walk' or 'don't walk' message, it serves as explicit guidance for pedestrians regarding when it is safe to cross the roadway. This function is vital as it helps prevent accidents and aids in the orderly flow of both pedestrian and vehicle traffic. By clearly signaling when pedestrians have the right of way, these signals contribute to a safer environment for all road users.

The other options suggest misunderstandings about the utility and necessity of pedestrian signals. For instance, claiming they have no impact on vehicle traffic ignores how these signals inform drivers to stop for pedestrians, significantly influencing traffic flow and safety. Describing pedestrian signals as optional contradicts their standardized implementation in many traffic laws meant to enhance public safety. Lastly, stating that they only apply at busy intersections overlooks the fact that pedestrian signals can be installed at various locations to ensure safety regardless of the volume of foot traffic.