The SPSetMidPointsBetweenPolys command places points midway between 2 polylines.
The SPSetMidPointsBetweenPolys command will allow the user to select two polylines then pick random locations on screen where they would like to get the midpoint between the 2 polylines. This can be useful for using the BestFit Alignment tool in Civil 3D when the surveyor only provided edge of pavement shots. At the command prompt for selecting the polylines you may enter T to bring up the Settings dialog.
Here is the result of using this tool: