Roundabouts in InRoads.

Hi Brian,

I have modeled a couple of roundabout projects with this workflow:

First I create a vertical alignment for the roads passing thru the roundabout.

Then I model them with a simple template (just a 2% slope from the center without bothering to have any end conditions) that is wide enough to overlap the entire circle, I then generate an alignment for the lip of curb for each quadrant with the surface that was generated with the wide template visualized on it. I then design a vertical profile using that surface as a guide, and then I create a template from the curb out and model that to the existing ground.

I then visualize the top surface features of the curb, sidewalk, slope intersections etc. as well as the centerline of the roads and then import those graphics as a DTM. To get the splitter islands I drape the design surface at the face of the curb and a line slightly offset for the top of the curb and then move the graphics of the top vertically with a dx=0,0,.5 command

The one problem using this method is the pavement area is a simple surface, not a component so subgrade volumes cant be computed as normal.

Dwight

hi,

The post from old discussion groups you brought up, was orginaly posted by Piotr. He explored his post in BeGeneral PL Community Forum (search for the topic: '[IR]Projektowanie rond'). This forum requires authorization and it's in Polish, however  some  usefull drafts are atached. 

Adam.