Is there a way to lay out a gutter in InRoads?

I am laying out a gutter along a road and there are some inlets on the gutter as well. I would like to model this in a way so that the gutter and inlets are connected as a system.

I do realize we can lay out a concrete v-shaped channel as a gutter but the problem is that I cannot start the gutter with a median drop inlet.

Actually the channel could end with a median drop inlet but just cannot start with it.

So is there anyway to do this?