In order to define a roundabout you will first need to identify the alignments of the arms (the incoming roads). If they don't already exist, draw accurate centerlines of each arm extending to at least to the point where the new roundabout will join any existing road (the blend point).
- Click Home tabCreate Design panelIntersections drop-downCreate Roundabout.
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On the New Roundabout Details dialog box, select the desired options.
- Click OK.
- Select the center of the new roundabout.
- Select the new access road center line.
- On the New Arm dialog box, select the desired options and click OK.
- Select the new access road center line.
- On the New Arm dialog box, select the desired options and click OK.
- Select the new access road center line.
- Continue selecting access roads then press Enter when finished.
The roundabout is created in the drawing.