Miscellaneous Enhancements

Learn about additional new enhancements.

New in 2026.2

Alignments

• Added a warning when exporting LandXML files containing unsupported curve types.
• Added a new system variable 'AeccEnhancedSpiralSampling' to control spiral tessellation.

Feature Lines

• Performance Improvements:
  • When editing elevations.
  • When selecting and querying in the feature line properties palette.
  • When offsetting siteless feature lines to maintain their independent non-site status.
  • When editing siteless feature lines.
  • When adding a Point of Intersection (PI) to a feature line's arc segment, maintain the original radius of both arc segments.
  • When importing and exporting to LandXML.
• Added a notification for clear feedback when converting a feature line segment from a straight line to an arc.
• Added the ability to edit the elevation of a PI and elevation point when hovering over the feature line PI or elevation point.
• Enabled conversion between feature line segments and arcs, allowing the extension of feature lines at either endpoint through both the ribbon and in-canvas interface.

New in 2026.1

Alignments

• Added an AutoRenumber option when using the Renumber Tags ribbon command (or EDITTAGNUMBERS on the command line). This allows for the automatic renumbering of tags. Learn more.

Cross Sections

• Added the 'Distance to Next Sample Line' property to the sample line label and the labels for incremental section data of the section data band style in the profile view.

Feature Lines

• Added the ability to right-click a feature line in the Prospector list view to select "Zoom to" and "Pan to" from the context menu.
• Added the ability to insert and delete Point of Intersection, insert and delete Elevation Point directly from canvas, when hovering over a feature line grip.

Superelevations

• Added notifications about requiring potential station adjustments when importing CSV files with Superelevation data into alignments containing station equations. Learn more.

Surfaces

• Improved surface creation from grading.

New in 2026

Coordinate System Updates

• Coordinate systems added for AutoCAD, Map and Civil 3D.
  • UK: rail and highway
  • Malaysia: EPSG CS
  • Saudi Arabia: SANSRS
  • Serbia: VCS ETRF89.OSTN15_height
  • Switzerland: vertical coordinate systems

Surface Performance Enhancements

• Rebuilding corridor performance improvement for corridors using a surface as a target.
• Surface analysis performance improvement.
• Performance improvement when cursor moves over a surface whose contours have large number of vertexes.

Customer Satisfaction Survey

• When you close Civil 3D, a customer satisfaction survey displays. The feedback collected from the survey is used to improve Civil 3D products.