What is indicated by the "Hold" symbol on the TOD?

The "Hold" symbol on the Train Operating Diagram (TOD) signifies that there is a required pause in service. This situation often arises when the train needs to stop for reasons such as scheduling adjustments, ensuring safety protocols are met, or waiting for further instructions before proceeding. This pause allows the train personnel to manage operational safety and efficiency, ensuring everything is in order before the journey continues.

Understanding the significance of the "Hold" symbol reinforces the importance of communication and coordination within train operations, ensuring that all train crew members are aware of any necessary adjustments in schedule or service.