Final answer:
When a pedestrian or bicyclist is crossing the street within a marked or unmarked crosswalk, drivers must stop and yield the right-of-way to them for their safety.
Step-by-step explanation:
If you encounter a pedestrian or bicyclist crossing the street within a clearly marked crosswalk or at an unmarked intersection, you must stop and yield the right-of-way to them. It's not only a courteous and safe practice but also typically a legal requirement to ensure the safety of pedestrians and bicyclists. Pedestrian safety is a significant concern, particularly in areas with heavy pedestrian traffic such as school zones or downtown areas. Rushing through or not observing the crosswalks can lead to serious accidents. A traffic signal can help manage vehicle speeds and provide safe crossing times for pedestrians, but even without a signal, drivers are responsible for yielding to those on foot or bicycle when they are legally crossing.