An InRoads user asked for Mark's thoughts on this question :
Marksman,
Sorry to bother you, but your help would be much appreciated. Functional line work should be nice and smooth with minimal amount of vertices. When an output is done of the 3D strings like Back of Kerb1 etc, via InRoads, it has thousands of them. Can these vertices be minimised2 before the output? Can they be minimised once they are output in MicroStation? Someone else designed it through the Roadway Designer; I didn't create the final DTM. Only answer if you have time and are happy to.
Kind regards,
MH
Here is the Zen Dude's response:
Ahoy Mate!
Nice to hear from the land under the Southern Cross!3 : )
Yes, when InRoads creates its breakline data it can be heavily saturated with points.
My guess is that this was modeled in the Roadway Designer with the Densify using Chord Height Tolerance toggled on in the Create Surface dialog box.
When those options are toggled on, it looks to the Project Options to determine how 'extra dense' to model anything curved. This applies to both horizontal and vertical curves. It uses the setting on the Tolerances tab. It may be something really small like this. You have to understand what this setting means in order to properly define the value. Otherwise you will get crazy dense breaklines on curves. This is how to control the output.
Now as far as an easy way of thinning it out in MicroStation? I'd have to ask one of my MicroStation guys . . . but guaranteed they are all sleeping right now since it's close to 1:00 a.m. here in Los Angeles and I gave them the night off ; )
I hope this helps.
Civilly yours,
- zen
Mark is an excellent instructor, very knowledgeable, well organized and very clear when presenting material. He was great and we could not have asked for a better instructor. 
