What is a potential consequence of not properly documenting switch actions?

Proper documentation of switch actions is crucial for ensuring the safety and efficiency of train operations. When the actions taken at switches are not documented correctly, it creates ambiguity regarding the state and configuration of the switches. This lack of clarity can lead to misunderstandings among train operators and potentially result in trains being routed incorrectly. Such errors increase the likelihood of accidents, which can endanger both personnel and cargo, as well as disrupt service.

In contrast, the other options reflect consequences that may arise from various issues but do not directly relate to the immediate safety concerns linked with the absence of documentation. While increased training costs and longer delays may occur due to operational inefficiencies, they do not necessarily stem directly from lack of documentation like the heightened risk of accidents does. The choice indicating "no consequences" fundamentally overlooks the critical safety implications inherent in the operation of switch actions.