Sight distance labels

[kwdsku]

I added labels to my profile vertical curves for Passing Sight Distance (PSD), Stopping Sight Distance (SSD), and eye height and object height for each. Does anyone know how AutoCad is calculating the values it gives? And how will these values relate to the required PSD/SSD?

[brainman1000]

It should be using the AASHTO standards based on the design speed in the alignment properties.