AutoCAD Civil 3D

[#1]

Basically I have 3dpolylines and some Splines. I would like to create a road file that uses the geometery of these objects to create a single line/crest of road file.

[#2]

What is a "Road File"?

If you mean a Profile: You need a 2d horizontal alignments, a profile view and execute the create profile tools to draw the profile.

If you are looking to create your horizontal alignment from 3d pline and splines. I don't think you can, but you can try to create alignment from objects. Although, I can't imagine trying to tell a surveyor or contractor to build something off a splined alignment.

[#3]

A road file meaning an actual file that can be loaded into a Trimble Controller, for survey. Basically we would you this file to "layout" a curve..But it would need to pickup the 3D components of the Splines and 3D Polylines..

[#4]

I'm no expert on the survey part but there has to be something in the tool box to export data

[#5]

oh yeah, i can export the data easy enough, using Trimble link.. It's creating the conent of teh file that is the hard part.

[#6]

Hmm.

I'm surprised one of the survey gurus haven't chimed in. Sinc? Allen?, John?