Reg - Aspect Step up & Step down

[Jerry1237]

From the operational point of view the above is correct. From a technical point of view, signals are designed to "step-down" usually upon a train passing through a section of railway. A driver should not see aspects step nor climb down. In the UK (mainline) that would be classed as an abnormal aspect sequence and requires a driver to stop at the next available safe place to report it.