I am trying to create a more than basic corridor in 2008 c3d for the first time, I am not sure how to do it. I am attempting to create a corridor for a roadway that is being widened on both sides. The sawcut lines have a constantly changing offset distance,as well as the new lip of curb lines. I have been trying to use an assembly offset on each side with transition lanes . I can get the first transition lane from the centerline to the sawcut line to work, but I can't figure out how to get the second transition lane from the sawcut to the new lip to work. Any thoughts would be appreciated.