Which is the efficient way to show one point from plan view into profile view?

I am interested in knowing this as well.

As a road designer, I occasionally work on projects where there are bridges, and we need to maintain a minimum clearance beneath the low structure elevation. It is not common at this point to receive smart geometry for these things. Most often we are given a station and an elevation for a single point. Since we have to design around that specific point, it would be very helpful to see it "physically" on the profile while designing. I'm not that experienced with the profiles to know if we can create or project a point element for vertical design.

Thank you.

I think you're heading in the right direction.  A crossing construction class element (centerline of drive) with that profile can help determine any potential driveway needs. 

Under the "Geometry" ribbon- use the Place Point command. Ensure you set a Feature Definition that has a robust feature that is easy to spot. Then, set your 2D View to a annotation scale that works well with the feature def you used for your point. Draw a Civil Geometry Line ("Geometry" ribbon- Place Line command) in your 2D Model that intersects the points you want to see. Cut a profile on that line. Within the profile view, run a 3D cut on that profile. Within that Profile Window, Select the Reference command and set that 3D Cut reference to allow snapping.

That should get you what you need.

Yeah, right.

It will be more convenience instead of drawing an baseline and draw its vertical profile in order to project intersection.

Thank you, Shawn.