Extend existing crossfall onto new feature

Using the vertical profile tools in Openroads is it possible to extend a crossfall from existing features onto a new feature.

e.g. I have a topo survey with a centreline and channel strings. I want to extend the existing crossfalls onto a new feature for widening a new road.

This would be similiar to the Minor option 103 Add string: extend/contract crossfall used in MX Road.