What is indicated by signal 12-85?

Signal 12-85 indicates that the train operator should proceed with caution at an allowable speed. This type of signal typically warns the operator to be alert for potential hazards ahead while still allowing them to continue the journey, albeit at a reduced speed to ensure safety. The caution signifies that there may be conditions that require a heightened awareness or the possibility of adjustments to speed depending on the surrounding environment or upcoming signals.

This signal is a key component in railway operations, as it helps manage train movements effectively while prioritizing safety. Operators need to be prepared to respond to any changes in the situation that may require stopping or adjusting speed, reinforcing the importance of vigilance when proceeding under such signals.