This option is for modifying the channels or back-of-footpath of a road carriageway.

You can change the road any time during the design process. Site3D will work out all the knock-on effects and update your site accordingly.

To access the tools for modifying road channels and footpaths click the Channel Tools button button and select the Channel or Footpath you want to modify.
The Channels/Footpaths toolbar will be shown:

Channels Toolbar

On the channel tools toolbar, click the Mitre Channel button Mitre button.

The following window is shown:

Channel mitre window

As you move the mouse over the Plan View you will see that the chainage selector is in operation on your chosen design line. It is awaiting you to pick the chainage position to indicate the start direction of the mitre.

After you have picked the start chainage, it will be awaiting for you to pick the chainage position to indicate the end direction of the mitre.

The mitre is formed by the intersection of the straight line extension from the Start point with the straight line extension at the End point. The following images illustrate the concept:

Road requiring mitred corner This image shows a road with standard parallel channels. The layout drawing indicates the outer channel on each bend should be squared off.
Start and End of Mitre To square off the bend we can use a Mitre item, picking the Start/End points on the straight parts which should be extended to make the required corner.
Result of mitre This image shows the resultant road after the Apply Changes button Apply Changes button has been clicked on the Channels toolbar.

Radius

The mitred corner can have a radius applied to fillet an arc around the corner. This can be useful for designing a variety of non-parallel path designs for Channels and Footpaths.

The following example, shows how to use a filleted mitre to widen the inner arc on a tight bend.

Road requiring mitred corner This image shows a road with standard parallel channels. The layout drawing indicates the inner curve of the bend should be widened with a larger radius.
Start and End of Mitre A Mitre item can be used to specify the straight line extensions which intersect to form the angle in which the new radius is required.
Start and End of Mitre Use the Radius Pick button to select the desired fillet radius on the inner side of the bend.
Result of mitre This image shows the resultant road after the Apply Changes button Apply Changes button has been clicked on the Channels toolbar.

The design path constructs created using the Channel/Footpath tools are remembered. If you subsequently make any other change to the designed site that would affect this road, then it will be updated automatcally to cope with that change.


See Also: