Final answer:
Train operators must make safety stops when approaching shop doors and bumping blocks to ensure a safe stop. These stops involve reducing the train's speed, applying the brakes gradually, and being cautious of any potential hazards or obstacles.
Step-by-step explanation:
When tracks are slippery or the weather is bad, train operators must take safety stops when approaching shop doors and bumping blocks. These safety stops are necessary to ensure that the train can come to a complete stop without any accidents or collisions. During these stops, the train operator will reduce the speed of the train and apply the brakes gradually to ensure a safe stop. They will also be cautious of any potential hazards or obstacles near the shop doors and bumping blocks to avoid any accidents or damage to the train or infrastructure.