Final answer:
It is best to go slowly and exercise caution when approaching a pedestrian crossing with a person with impaired vision present, to ensure their safety and adhere to speed limits. For the displacement question, the answer is False; the displacement is the same for both individuals regardless of the order of movements.
Step-by-step explanation:
When a person with impaired vision is in a pedestrian crossing, it is not only best to go slowly, but it is also imperative for their safety and the safety of others. This cautious approach is supported by the emphasis on pedestrian safety which is a significant concern, particularly near schools and campuses where people are frequently crossing. It is important for vehicles to adhere to the posted speed limit and be prepared to stop if necessary when approaching a crosswalk, especially when pedestrians who may have difficulty crossing are present.
The second part of your questions relates to displacement. Displacement is a vector quantity that represents the shortest path between the initial and final positions of a point traversing a path. The order in which the movements are made does not affect the resulting displacement. Hence, for the true/false question, False would be the correct answer, as both persons would have the same displacement, provided the blocks are of equal length in both directions.