Design Efficiency Updates Create a fixed circular or fixed parabolic vertical curve by specifying a high or a low point. You can use the Convert Curves command to convert the fixed parabolic curves so they are compatible with AutoCAD Civil 3D , but the fixed circular curves cannot be converted. This value shows the total vertical curve length. The existing property, Length, shows the length of the solved portion of the curve geometry, such as when tangents are attached along the curves. The Total Curve Length property is available for all vertical curves. The Total Curve Length property is editable for fixed circular and fixed parabolic vertical curves that you create by specifying a high or low point. The ApplyAOR option in the Subassembly Composer now has the following effects on points and links for rail subassemblies as they appear in the Subassembly Composer flowchart: Geometry before ApplyAOR is specified for an item in the flowchart is not adjusted when cant is applied. Geometry after ApplyAOR is specified for an item in the flowchart, and which is created so that it is directly or indirectly dependent on the item which has ApplyAOR defined, is adjusted when cant is applied. Because of these effects, you can achieve the expected cant behavior by specifying the ApplyAOR option for one or more links and make subsequent points and links in the flowchart dependent on those links.