Final answer:
A pedestrian crossing sign informs drivers that they must stop and yield to pedestrians crossing the road, which is critical for safety as it helps to prevent accidents by regulating vehicle speeds and pedestrian movement.
Step-by-step explanation:
A pedestrian crossing sign indicates that vehicles must stop and yield the right-of-way to pedestrians. This is crucial for pedestrian safety, especially in areas where students and other individuals need to cross the road to get to places like campuses. The presence of a pedestrian crossing sign also serves as a reminder for drivers to adhere to the posted speed limit and to be vigilant for individuals who may be crossing the road.
Without such signals or signs, vehicles may speed through intersections with little regard for safety, increasing the risk of accidents. A pedestrian crossing sign enables people to cross roads at appropriate times without having to dodge in and out of traffic. This measure can significantly reduce the occurrence of traffic accidents and enhance the overall safety of a busy intersection.