Default Roadway Properties Dialog

Sub-grade Width

The sub-grade width can either be entered explicitly or automatically calculated from the surfacing material above. If the sub-grade is automatically calculated from the surfacing (Auto size set) the sub-grade width will vary with super-elevation.

Crown Slopes %

The crown slope applies when there is no super-elevation. When super-elevation is present the crown slope is transitioned from full crown to full super.

Sub-grade Daylight Distance

Daylighting can be used to automatically extend the sub-grade. This parameter only applies if the edge of road is below topography (in cut). It the horizontal distance from the edge of the sub-grade to ground is less than this parameter the sub-grade is extended horizontally to meet ground.

Surfacing

Surfacing layers are defined from sub-grade upwards e.g. Layer 1 is the first layer above sub-grade, layer 2 is the second layer above sub-grade and so on.

Depth – Vertical thickness of the surfacing layer.

Fill Slope – Fill angle for layer.

Width – This is the horizontal distance from CL to the top edge of surfacing (surfacing slope not included).

Auto Size – if set, the the width of surfacing is determined from the layer above (taking into account crown or super-elevation).

Override Parameters