Power Geopak SS4 - Intersection Modeling

Hello,

I am working on a roadway reconstruction project where there are multiple intersection and driveways along the corridor that need to be modeled. I have already laid out my geometry and modeled the corridor but not sure what the best approach is to modeling the intersections and driveways.

The proposed corridor, intersections, and driveways will need to tie into existing pavement/ground. What is the best way to model an intersection that ties a proposed corridor into existing pavement? The screen shot below has the modeled corridor on top and existing pavement on the bottom.

Any help with this would be much appreciated.

Thanks,

Alec