Where is sand stored according to operational guidelines?

The correct location for sand storage, according to operational guidelines, is at the platform ends. Storing sand in this area provides easy access for train operators when it is needed to enhance traction on the tracks, especially in adverse weather conditions such as rain or snow. This strategic placement allows for quick application of sand, which is essential for maintaining the safety and efficiency of train operations. Additionally, having sand stored at the platform ends ensures that it is out of the way of regular activities and does not obstruct passenger movement or other operations on the platform.