Final answer:
Train operators must stop and ensure pedestrian safety at crosswalks, especially in high-traffic campus areas, allowing students to cross at appropriate times.
Step-by-step explanation:
When approaching crosswalks in the yard, the train operator or any vehicle driver must stop moving and become stationary until the crosswalk is clear, ensuring pedestrian safety. This precaution aids in preventing accidents, particularly in areas with high pedestrian activity such as near campuses, where students need to cross safely. Traffic signals play a critical role in managing traffic and pedestrian flow, allowing individuals to cross at appropriate times. Also, they ensure that vehicles are not able to speed through the intersection.