AutoCAD Civil 3D

What's new in this version:

AutoCAD Civil 3D 2025.2
New Features:
New in Rail Workflows:
- To facilitate the work of rail designers in the UK and France and meet their design standards, Grade/Slope in Ambient Settings now has (run) and (mm per m, mm/m) formats for cant gradient parameters in the Cant Tabular Editor.
- For more information, see Ambient Settings Tab (Drawing Settings Dialog Box).
- Added new cant parameters for Civil 3D labels. See Layout Tab (Label Style Composer Dialog Box) for more information on editing label components.
- Cant Information labels and Cant Information Expressions
- Curve Radius
- Equilibrium Cant Gradient
- Equilibrium Cant Vertical Speed
- Cant Deficiency Gradient
- Cant Deficiency Vertical Speed
- Cant Jerk
- Cant Ratio
- Cant Critical Points labels and Cant Critical Points Expressions
- Curve Radius
- Equilibrium Cant Gradient
- Equilibrium Cant Vertical Speed
- Cant Deficiency Gradient
- Cant Deficiency Vertical Speed
- Cant Jerk
- Cant Ratio
- Cant Data Band for Profile Views
- Equilibrium Cant Gradient
- Equilibrium Cant Vertical Speed
- Cant Deficiency Gradient
- Cant Deficiency Vertical Speed
- Cant Jerk
- Cant Ratio
- Horizontal Data Band for Spirals for Profile Views
- Equilibrium Cant Gradient
- Equilibrium Cant Vertical Speed
- Cant Deficiency Gradient
- Cant Deficiency Vertical Speed
- Added new cant parameters for horizontal alignment in the Cant Tabular Editor for cant calculations. This provides an overview of the necessary parameters in rail design related to such calculations.
- Cant Jerk (m/s^3 or ft/s^3)
- Cant Ratio
- For more information, see Cant Tabular Editor Dialog Box.
- Added API support for the Cant Jerk and Cant Ratio parameters.
- Extended support for the Cant parameters in the RailCANTInfo structure API.
- Added the CheckTurnoutCatalog command to check the syntax or configuration errors in turnout standard files. For more information on turnout commands, see Turnout Command Reference.

New in Profile Views:
- Additional cant profile band information can now display for a secondary alignment:
- Added an Alignment2 property to display information for a secondary alignment in the cant band.
- Added a Max Offset Distance property as a range to limit secondary alignment displayed in the cant band.
- Added the ability to label the Cant Critical Station in the cant band.
- See Layout Tab (Label Style Composer Dialog Box) for more information on editing label components.
- Added the ability to add diagrams and ticks for Cant Critical Points and Alignment Critical points in the band.
- Added the ability to add diagrams for Applied Cant and Equilibrium Cant in the band.
- Added the ability to label projected stations of the primary alignment in the cant band.
- Primary Alignment Mapped Station - Start
- Primary Alignment Mapped Raw Station - Start
- See Layout Tab (Label Style Composer Dialog Box) for more information on editing label components.
- Added API support for the updated secondary alignment band workflows.

New in Surface Workflows:
- Surface editing with triangles or points enabled
- Added support to automatically enable component display when adding a surface line or adding/moving a surface point.

New in Project Explorer:
- Added additional entity properties when setting the Set Column Layout for Alignment/Profile Calculated Stations.
- For more information, see About Layout Options Alignment Tab.
- Added new entity properties from the Civil 3D Cant Tabular editor when setting the Set Column Layout for Cant Curves.
- Curve Radius
- Equilibrium Cant Gradient
- Equilibrium Cant Vertical Speed
- Cant Deficiency Gradient
- Cant Deficiency Vertical Speed
- Cant Jerk
- Cant Ratio
- For more information, see About Layout Options Alignment Tab.
- Added support for configuring the Calculated Stations list independently for each alignment type.
- For more information, see About Layout Options Alignment Tab.
- Added support to select multiple objects in an Object Set. this allows the ability to duplicate and apply filters to many objects at a time.
- For more information, see About Working with Object Sets.
- Add a relaxed encoding option for writing UTF-8 JSON report files. This allows some report results to be more legible.
- For more information, see About the Report Options Window.

New in Dynamo for Civil 3D:
- Nodes for labels
- New nodes for labels boost plan production workflows. Label creation can be automated for many types of labels, and the general-purpose “Label” category provides nodes for querying and modifying information for any label. For example, these nodes can be used to set label dragged offset locations or to override text for specific label components.
- Pick Point node
- A new “Pick Point” node provides the ability to specify a point in the current document and return it as a Dynamo point. This node can also be configured as an input in Dynamo Player.
- In-depth documentation for AutoCAD nodes
- The nodes in the AutoCAD section of the library now include additional documentation and sample graphs to help explain how they work. To view this information, right-click on a node and then click “Help…”, or select the node and press F1.
- Additional nodes for rail cant parameters
- The Cant Critical Station category has been expanded with new nodes for querying industry-standard railway cant parameters such as equilibrium cant gradient, cant deficiency vertical speed, cant ratio, and more. In addition, the Alignment.CantInfoAtStation node has been improved with additional output ports for retrieving these parameter values at any station along a rail alignment.
- Updated Dynamo Core
- Dynamo Core has been updated to version 3.3, which includes improvements to the Package Manager, enhanced TuneUp package for graph performance monitoring, bulk update option for Python node engine, and more. Read more about the major updates in the Dynamo 3.3 blog post.
- Other minor improvements
- The Object.ByGeometry node now supports creating point objects from Dynamo points.
- Improved the clarity of descriptions, tooltips, and messages for several nodes.
- The Choose Property Data Type dropdown node now includes "List" in the available options.
- The PropertySetDefinition.AddManualPropertyDefinition node is now configured to only accept list definitions that are configured to apply to manual property definitions.
- The Alignment.ImportLabelSet node now returns the given alignment instead of void.
- The Choose Hatch Pattern node is now configured to retrieve pre-defined hatch pattern names from either the acad.pat or acadiso.pat files, depending on whether the drawing units are imperial or metric.

Miscellaneous Enhancements:
- LandXML Enhancements: Added rotation (rot) and center point support for feature line curves in LandXML import and export workflows

API Enhancements:
- Updates to the API have been made in the following feature areas
- Added new properties available under cant critical stations of cant curves
- CANTCriticalStation::CantJerk. Gets the Cant Jerk setting for a cant critical station
- CANTCriticalStation::CantRatio. Gets the Cant Ratio setting for a cant critical station
- For more information, see Cant Tabular Editor Dialog Box
- Added new properties available under the RailCANTInfo structure
- RailCANTInfo.LateralAcceleration
- RailCANTInfo.CantGradient
- RailCANTInfo.CurveRadius
- RailCANTInfo.EquilibriumCant
- RailCANTInfo.EquilibriumCantGradient
- RailCANTInfo.EquilibriumCantVerticalSpeed
- RailCANTInfo.CantDeficiency
- RailCANTInfo.CantDeficiencyGradient
- RailCANTInfo.CantDeficiencyVerticalSpeed
- RailCANTInfo.CantRatio
- RailCANTInfo.CantJerk
- RailCANTInfo.VerticalSpeed
- RailCANTInfo.DesignSpeed
- Improved performance for the RailCANTInfo structure
- Updated properties for class ProfileViewBandItem
- ProfileViewBandItem.Alingment2Id. Sets the secondary alignment for a Cant Data band in a profile view
- ProfileViewBandItem.MaxDistance. Sets the maximum offset distance for a Cant Data band in a profile view
- For more information on band properties, see Bands Tab (Profile View Properties Dialog Box)
- Updated properties for class ProfileViewBandSetItem
- ProfileViewBandSetItem::GetHorizontalGeometryPointsOptions(). Gets the Horizontal Geometry Points options information
- ProfileViewBandSetItem::SetHorizontalGeometryPointsOptions. Sets the Horizontal Geometry Points options
- For more information on geometry points in a band, see Geometry Points to Label in Band Dialog Box
- Updates for gravity pipes
- Added the API class CrossingPipeProfileLabel
- Added ObjectIDCollection methods
- CrossingPipeProfileLabel.Create(ObjectId profileViewPartId, ObjectId profileViewId, ObjectId labelStyleId)
- CrossingPipeProfileLabel.Create(ObjectId profileViewPartId, ObjectId profileViewId)
- GetAvailableLabelIds(ObjectId profileViewPartId, ObjectId profileViewId);}}

Fixed:
Alignments:
- Fixed an issue in which the Alignment Direction arrowhead did not match the selected Arrowhead type in the Alignment Style Marker tab.
- Assemblies/Subassemblies:
- Fixed an issue in which design automation would rebuild a corridor using PKT files.

Corridors:
- Fixed an issue in which feature lines extracted from a corridor moved after splitting the corridor region.
- Fixed an issue in which the refill factor field for the Quantity Take Off was empty.
- Fixed an issue in which the corridor baseline elevation dropped to 0 when it was cyclic.
- Fixed an issue in which it was impossible to set the start and end stations of a region as the transition start and end stations.

Dynamo for Civil 3D:
- Fixed an issue where the CivilObject.SetStyle node would display a warning message for certain object types.
- Fixed an issue where the ProfileView.ByAlignment node would return null when the default object layer setting for new profile views was set to a layer that didn't exist in the drawing.
- Fixed an issue where the Profile.LowPoints and Profile.HighPoints nodes would return incorrect values for certain vertical curves.
- Fixed an issue where the Object.Export node would occasionally fail to export objects.
- Fixed an issue where the Part.PartSize node would display a warning for null structures.
- Fixed an issue where the CorridorTarget.SetTargetToOption node would display a warning when using "nearest" or "farthest" for an elevation target.
- Fixed an issue where the Civil Object by Name node was unable to return a TIN surface when a TIN volume surface was also present in the drawing.
- Fixed an issue where the Point.ByGeometry node would return null when provided with a layer that did not exist in the current document.
- Fixed an issue where the Layer.Delete node would display a warning message saying that the layer was in use and could not be deleted, even though the layer could be deleted in the layer properties manager.
- Fixed an issue where the Layer.IsUsed node would sometimes return True even though the layer was not assigned to any objects.
- Fixed an issue where the Alignment.ByPoints node would return null when a default alignment style was not set in the drawing.
- Fixed an issue where the Surface.ContoursAtElevation node would incorrectly round the given elevation value.
- Fixed an issue where the Alignment.CantInfoAtStation node returned the wrong data type for the "Pivot" value.
- Fixed an issue where the PVI.NextPVI and PVI.PreviousPVI nodes would return incorrect values in certain cases.
- Fixed an issue where the PropertySetDefinition.AddAutomaticPropertyDefinition and PropertySetDefinition.AddManualPropertyDefinition nodes would modify existing non-automatic property definitions that shared the same name.
- Fixed an issue where the Object.SetHyperlink node would not update existing hyperlinks in certain cases.
- Fixed an issue where the Object.Hyperlink node would return the display name of the hyperlink.
- Fixed an issue where the Object.ReferenceDocuments node would display a warning message when the object did not have any attached reference documents.
- Fixed an issue where the Site.ByName node would not update the description of the site.
- Fixed an issue where the Profile.LowPoints node would display a warning and return null values when used with a surface profile.
- Fixed an issue where the Object.Rotation node would return 0 for objects that do not have a rotation property. The node now returns null in this scenario.
- Fixed an issue with the Label Blocks with Multileaders sample file that caused too many leaders to be created.
- Fixed an issue where the Civil3D_ReadAndWriteSubassemblyParameters sample graph would show warnings when run from the command line.

ESRI GIS Data Integration:
- Fixed a stability issue that could occur when importing an ArcGIS layer.
- Fixed an issue in which version information was missing for the AeccFdoArcGISOnlineMgd.dll.

Feature Lines:
- Fixed an issue in which Weed Vertices would not function correctly for the Close Point Removal option.
- Fixed an issue in which edits to feature lines that are not in a site could not be saved when selecting Save As or Qsave.

Gradings:
- Improved performance when opening or regenerating drawings that include gradings.

LandXML:
- Improve performance of the landxmlin command when a file contains a large number of feature lines or 3d polylines added as breaklines.
- Fixed an issue in which importing a rail alignment with Cant information through LandXML caused unexpected results in Cant Tabular Editor.
- Fixed an issue in which radius values were displayed incorrectly after a Rail Alignment import from LandXML.
- Fixed an issue in which start and end stations were duplicated and imported as Manual Stations after a Rail Alignment import from LandXML.
- Fixed an issue in which some of the Cant Critical Stations or Cant Manual Stations were not included after a Rail Alignment import via LandXML.

Parcels:
- Fixed an issue in which labels on an xrefed parcel would be removed when opening a drawing.
- Pressure Pipes
- Fixed an issue in which the profile view label was not correct for pressure part reference alignment stations.
- Fixed an issue in which a pressure pipe hatch in profile view did not trim to the profile view.

Profile View:
- Fixed an issue in which the Horizontal geometry - Curvature displays incorrectly when an alignment starts with spiral.
- Improved performance when applying horizontal geometry bands and cant data bands in a profile view.

Rail Design:
- Fixed an issue that occurred when a diverted alignment with spirals became disconnected when changed to backward
- Fixed an issue in which column width truncated title data in the Cant Tabular Editor
- Fixed an issue in which the order of critical stations could not be changed by changing its start station (End Level Rail and Begin Full Cant)
- Adjusted columns in the Cant Tabular Editor to display in a specific order to improve accessibility and readability
- Fixed an issue where Cant information from Cant Tabular Editor was not fully cleared after removing attempt
- Fixed an issue where the picked station for Cant Critical Station shows on alignment with Station Equation shows wrong value in Cant Tabular Editor
- Fixed an issue in which some of Cant Critical Stations or Cant Manual Stations were not included after Rail Alignment import via LandXML
- Fixed an issue where start and end station were duplicated and imported as Manual Stations by adjusting the import algorithm

Reference Templates:
- Fixed an issue in which layers used by blocks could be overridden by referenced templates when the AeccRefTemplateAutoUpdate system variable was set to 2

Subassembly Composer:
- Fixed an issue in which the "Add link to from point" checkbox could not be deselected
- Fixed an issue that occurred in the Subassembly Composer flowchart when dragging a surface line in the preview window
- Superelevation
- Fixed an issue in which clicking Clear all Superelevation data in the Superelevation Tabular Editor did not clear all Superelevation data

Surfaces:
- Fixed an issue in which surface points displayed or plotted when its style layer is turned off or frozen
- Fixed an issue in which rebuilding a snapshot for a quick landxml import failed
- Fixed an issue in which multiple swap edge selection messages appeared when swap edge did not succeed


AutoCAD Civil 3D 2025.0.1
The Autodesk Civil 3D 2025.0.1 Update fixes the following issues:
Surfaces:
- Fixed a stability issue that could occur with large surface geometry and DWG inconsistencies when saving during snapshot operations

Data Shortcuts:
- Fixed a stability issue that could occur when using Undo on a promotion of a data shortcut reference in a large surface


AutoCAD Civil 3D 2024.3
New in Corridor Workflows:
- Learn about enhancements to corridor workflows.

Miscellaneous Enhancements:
- Learn about additional new enhancements.

New in Dynamo for Civil 3D
- Learn about enhancements to Dynamo for Civil 3D.

API Enhancements
- Learn about enhancements to the API.


AutoCAD Civil 3D 2024.2
New in ArcGIS Workflows
- Learn about enhancements to ArcGIS workflows.

New in Project Explorer
- Learn about enhancements to Project Explorer.

New in Collaboration for Civil 3D
- Learn about enhancements to Collaboration for Civil 3D workflows.

API Enhancements
- Learn about enhancements to the API.


AutoCAD Civil 3D 2024.1
New in Subassembly Workflows
- Learn about enhancements to subassembly workflows.

New in Corridor Workflows
- Learn about enhancements to corridor workflows.

New in ArcGIS Workflows
- Learn about enhancements to ArcGIS workflows.

New in Pressure Networks
- Learn about enhancements to pressure networks.

New in Gravity Networks
- Learn about enhancements to gravity networks.

New in Project Explorer
- Learn about enhancements to Project Explorer.

New in Rail Workflows
- Learn about enhancements to rail workflows.

New in Surface Workflows
- Learn about enhancements to surface workflows.

API Enhancements
- Learn about enhancements to the API.

New in Dynamo for Civil 3D
- Learn about enhancements to Dynamo for Civil 3D.

Autodesk Assistant
- A new AI-guided assistant is available in Civil 3D 2024 with the installation of the AutoCAD 2024.1 Update.


AutoCAD Civil 3D 2024
New in Subassembly Workflows
- Learn about enhancements to subassembly workflows.

New in Corridor Workflows
- Learn about enhancements to corridor workflows.

New in ArcGIS Workflows
- Learn about enhancements to ArcGIS workflows.

New in Pressure Networks
- Learn about enhancements to pressure networks.

New in Project Explorer
- Learn about enhancements to Project Explorer.

API Enhancements
- Learn about enhancements to the API.

New in Dynamo for Civil 3D
- Learn about enhancements to Dynamo for Civil 3D.

New in Grading Optimization
- Learn about enhancements to Grading Optimization.


AutoCAD Civil 3D 2022.0.1
- The Autodesk Civil 3D 2022.0.1 Update fixes a stability issue that would occur when deleting parcel segments and then using the UNDO and PURGE commands


AutoCAD Civil 3D 2021
New features:
Design Efficiency Updates:
Use new and enhanced pressure network commands to create and edit path-based pressure networks:
- Add path-based pressure network pipe runs by selecting locations to define the path, or by selecting existing objects or parts in the drawing. When you grip edit pipe runs to change their locations and update the pressure network path, the parts remain connected and the fittings are updated using available part sizes in the current parts list.
- Add pipe runs to an existing pressure network. A path-based pressure network can contain multiple pipe runs. When creating a pipe run, you can optionally create a surface profile for the pipe run to follow.
- Add bends automatically when creating pipe runs
- Add branch fittings to create intersecting pipe runs, automatically using the nearest fitting size from the current parts list
- Add and remove bends, automatically adding or removing points of intersection and fittings
- Break or merge pipe runs
- Use the new Pipe Run Profile Settings dialog box to control how a pipe run follows a surface or a surface profile and to add the pressure network to a new or existing profile view

Collaboration and Data Exchange Updates:
Use workflows between Civil 3D and InfraWorks to add bridges to your corridor designs. If the bridges are changed and republished from InfraWorks, you can reload them into your drawing:
- A roadway designer can design an alignment or a corridor in Civil 3D and then a bridge designer can bring the alignment or corridor into InfraWorks and add a bridge
- When the bridge is completed in InfraWorks, the bridge designer can publish the bridge to an IMX dataset which the road designer can bring into Civil 3D
- When you open an InfraWorks dataset in Civil 3D that contains bridges, bridge objects are created in the drawing
- The appearance of bridges in plan view is controlled using the Bridges to Civil 3D layer settings, which you can set up from the Configure InfraWorks - Civil 3D Exchange Settings dialog box
- You can project bridges to profile view to create general arrangement sheets. When projected to profile views, the appearance of the bridges is controlled using bridge projection styles
- If the bridge dataset is republished from InfraWorks, a message will be displayed in Civil 3D and you can reload the dataset into your drawing

Interoperability between Civil 3D and InfraWorks for corridors has been enhanced:
- You can now create corridor component roads in InfraWorks from Civil 3D corridors. A corridor component road represents the designed corridor in Civil 3D and is read-only in InfraWorks.
- When you bring a Civil 3D corridor into InfraWorks as a corridor component road, geometry for the shapes and links is created in the InfraWorks model. You can use the Component Mapping dialog box in InfraWorks to specify how the shapes and links are mapped to materials.
- Options are now available in the Refine Selection Set dialog box to select InfraWorks tunnels and generic objects. InfraWorks tunnels are now brought into Civil 3D as mesh objects. Property set data is now created in Civil 3D for InfraWorks tunnels and generic objects.
- The Publish to ArcGIS command and the Export to FGDB command now include the ability to output object properties as ArcGIS attribute information
- Project data for use with Autodesk Collaboration for Civil 3D can be stored on the Europe data center

Other Updates:
- The installation for Dynamo for Autodesk Civil 3D is now integrated into the installation for Civil 3D
- Support for the Oregon Coordinate Reference System (OCRS) has been added


AutoCAD Civil 3D 2020.2
New:
Autodesk Civil 3D 2020.2 provides support for Autodesk Collaboration for Civil 3D, including automatic file locking and unlocking for the documents in the BIM 360 project. To work in a BIM 360 project, you can use the same workflows in Civil 3D that you use to work locally or on a LAN, but instead of saving documents locally, you'll use a Desktop Connector-enabled connected drive to work with the documents in BIM 360. Share documents in BIM 360:

- Access your BIM 360 accounts and projects directly in Autodesk Civil 3D 2020.2 using a Desktop Connector-enabled drive
- Save and upload Civil 3D drawings to BIM 360 to share with project team members
- Use automatic file locking capabilities to avoid editing conflicts. A document is automatically locked when you open it so only you can edit it, and it is automatically unlocked when you close it

Collaborate on data shortcut projects in BIM 360:
- Use familiar commands and workflows to create and work with data shortcut projects in BIM 360
- Check for updates of referenced files in the current drawing by using the Check Reference Status command

Access documents in your BIM 360 projects from the updated Start tab:
- Use the new BIM 360 page on the Start tab in Civil 3D to access the documents in your BIM 360 projects
- Access recently-used documents on the Recent page


Fixes:
Corridors:
- Fixed an issue in which corridor point labels were not created correctly for data referenced corridors
- To display the correct label content for a data referenced corridor, apply the corridor assembly to all of the stations to be labeled in the data shortcut source drawing. Apply the assembly at the same stations as the sample lines that are created on the data referenced corridor. You can apply the assembly to additional stations using the EditCorrRegionFreq command. After applying the assembly to the stations in the source drawing and the data shortcut references are synchronized, the labels on the data referenced corridors will update with the correct values

Data Shortcuts:
- Fixed an issue in which you could not upload drawings and their references if the drawings contained nested xrefs or data shortcut references
- Fixed an issue that caused a delay to occur in some circumstances when creating data shortcuts

ESRI ArcGIS Data Workflows:
- Fixed an issue in the German version of Civil 3D in which the Save Back button was not displayed correctly
- Updated two warning messages for clarity
- Fixed an issue in which an empty dialog box opened when a layer with an empty portal URL was selected to import
- Fixed an issue in which the automatic configuration settings for using a proxy server to access the internet prevented the Autodesk Connector for ArcGIS, Save Back, and Publish to ArcGIS commands from running as expected

Miscellaneous:
- Fixed an issue in which Civil 3D would close unexpectedly when running a command if the STARTUP system variable was set to 2
- Fixed an issue in which drawings that contained xrefs from Civil 3D releases prior to 2018 were unintentionally upgraded when uploaded to BIM 360
- Fixed an issue in which an expression in a child label style's Rotation Angle field was removed after applying a reference template

Object Enabler
- Fixed an issue in which an AutoCAD block could not be inserted into a drawing when using AutoCAD with the Civil 3D Object Enabler or when running Civil 3D as AutoCAD

Pipe Networks:
- Fixed an issue in which specifying a Runoff Coefficient of 1.0 would prevent a gravity network analysis from completing successfully
- Fixed an issue in which structures created with Inventor and the Infrastructure Parts Editor did not appear correctly in profile views when the structure style used the Display as Boundary option on the Profile tab
- Fixed an issue where the style, rules, and other settings could not be changed in a parts list for the null structure
- Fixed an issue in which grip editing a pipe would disconnect it from an attached structure

Pressure Networks
- Fixed an issue in which fitting and appurtenance labels showed question marks for the station value if < none > was specified for the label’s reference alignment

Surfaces:
- Fixed an issue in which a surface was displayed as filled when the surface style was set to display only the border and the View Style setting was set to Shaded


AutoCAD Civil 3D 2020.1
New:
Design Efficiency Updates:
- Create, edit, and export rail lines using the following commands on the Rail ribbon tab
You can create dynamic 3D polylines or feature lines from a rail alignment that represent the left, center, and right rail lines:
- The rail lines are created with common stationing based on a specified tolerance or interval, and they dynamically adjust to modifications to the parent rail alignment, profile, and cant
- Rail line station data can be exported to a CSV file for design validation and for use in other applications

- French and German design rules are now available for rail platform edge creation. When you are creating a rail platform edge, you can select France_Metric.json or Germany_Metric.json as the design rule file to use. For more information, see Create/Edit Platform Edge Dialog Box
- The rail turnout catalog has been extended to include French turnouts based on SNCF standards


Fixed:
Autodesk Subassembly Composer:
- Fixed an issue in which superelevation of subassemblies created from the Subassembly Composer was not incorporated into a corridor
- Improved performance when opening rail subassembly PKT files that use cant

Corridors:
- Fixed an issue in which rehab corridor terminology was translated inconsistently

Data Shortcuts:
- Fixed an issue in which you could not close the folder selection dialog box when renaming the existing working folder
- Fixed an issue in which data shortcut references would not synchronize correctly
- Fixed an issue in which a data shortcut could be created from an unsaved drawing, which would result in a data shortcut without a source object

Esri ArcGIS Data Workflows:
- Improved stability when selecting a feature line that was imported from ArcGIS as a corridor baseline
- Fixed an issue in which a feature line imported from ArcGIS with the same geometry and name as an existing feature line was not renamed

Export Civil 3D Drawing:
- Fixed an issue in which multileaders did not explode properly when using the Export Civil 3D Drawing command and exporting to the AutoCAD 2010 drawing version or an earlier drawing version

Feature Lines:
- Fixed an issue in which the elevation of a feature line was set to zero when using the AUDIT command
- Fixed an issue in which deleting a curve from a feature line would cause the resulting vertices to have incorrect elevations
- Note: The AutoCAD 2020.1 Update contains a fix for an issue in which feature line glyphs would not appear after using the LAYISO command to isolate a layer in Civil 3D

Interoperability with Autodesk InfraWorks:
- Fixed an issue in which a curb and gutter component would be in the wrong orientation when brought into Civil 3D from InfraWorks

LandXML:
- Fixed an issue that caused alignments to be added to sites when they were imported from a LandXML file

Miscellaneous:
- Fixed an issue in which the AutoCAD 2018 version of DXF was missing from the application menu
- Improved stability when performing a mapcheck analysis on a parcel with curved edges
- Fixed an issue in which frozen layers were improperly displayed in shared views
- Fixed an issue where in some environments, applying customization files caused Civil 3D to close unexpectedly on startup

Pipe Networks:
- Fixed an issue in which pipes and structures used the units specified in the pipe network feature settings instead of the units specified in the pipe and structure feature settings
- Fixed an issue in which a pipe centerline that was referenced into a drawing using an xref was displayed using the color of the xref layer
- Fixed an issue where pipe networks that used a style in which only the centerline was displayed in plan view were not visible when the visual style for the drawing was set to Conceptual
- Fixed an issue in which spanning pipe labels could not be moved to new locations along pipes in a plan view
- Fixed an issue in which inlet dimensions were not displayed in a gravity network analysis report

Points:
- Fixed an issue in which the point data in a .csv file parsed incorrectly during the point import process when the data contained user defined properties
- Fixed an issue in which the COGO points referenced into a drawing with an xref would update every time the drawing was opened
- Fixed an issue that caused properties on the Query Builder tab of the Point Group Properties dialog box to change after attaching an external reference

Pressure Networks:
- Fixed an issue in which replacement parts were not applied properly when swapping pressure parts and an error would be displayed
- Fixed an issue in which pressure network parts were removed unexpectedly from a profile view after using the Delete Part command. This issue would occur in cases where an alignment had been created from the pressure network in the opposite direction of the pressure network
- Fixed an issue in which the location of a pressure network fitting in profile view was incorrect
- Fixed an issue in which the last pressure network fitting was not included when creating an alignment from a pressure network
- Fixed an issue in which a pressure pipe drawn off the end of an existing pipe in profile view using the Profile Layout Tools was added to the opposite end of the existing pipe
- Fixed an issue in which a curved pipe in a pressure network appeared straight in plan view after using the Follow Surface command and then grip editing the pipe in profile view
- Fixed an issue in which changing the reference alignment of a pressure network did not update the pressure network labels
- Fixed an issue in which you could not set the pressure network catalog after applying a custom user profile
- Fixed an issue in which plug and cap fittings were not displayed correctly in a profile view
- Fixed an issue in which pressure pipe fittings on a frozen layer were improperly displayed after using the REGEN command
- Fixed an issue in which pressure pipe fittings were improperly scaled in a profile view when opened in an object-enabled AutoCAD session

Reference Templates:
- Fixed an issue in which the saved path of a reference template could not be changed
- Fixed an issue in which the Plotted Unit Display Type and Driving Direction in the Ambient Settings were not referenced into a host drawing from a reference template
- Fixed an issue with reference templates in which the Blocks check box on the Other Resource tab could not be cleared when there were no blocks in the collection
- Improved stability when using the preview pane in the Attach Referenced Template dialog box
- Fixed an issue in which grading criteria sets were not displayed in the Attach Referenced Template dialog box
- Fixed an issue in which an attached reference template would overwrite the units in a drawing

Surfaces:
- Fixed an issue for volume surface elevation analysis in which an incorrect volume surface was reported when the maximum elevation range was greater than the surface maximum elevation but less than 0
- Fixed an issue where the volume of a volume surface shown in a surface elevation legend table did not match the volume shown in the surface properties
- Fixed an issue where the volume of a volume surface shown in a surface elevation legend table was incorrect when the elevation analysis contained a range with a negative elevation value

Survey:
- Fixed an issue in which survey figure data imported incompletely
- Fixed an issue where accessing survey figure properties in model space from within a locked layout viewport would cause the viewport scale to change
- Fixed an issue in which you could not select a network path as the working folder for a survey database

Traverse Editor:
- Fixed an issue in which side shots were incorrectly included in a traverse after performing an adjustment


AutoCAD Civil 3D 2020
Dynamo for Civil 3D:
- Use Dynamo for programming and design automation. Define scripts and routines in a visual environment to design and expedite workflows

Storm and sanitary analysis:
- Set individual tailwater conditions for each designed storm, use dimensionless Hydrographs per sub-basin, and use new storage chambers by ADS

Gravity network analysis:
- Use the updated Analyze Gravity Network dialog to analyze a pipe network and apply the results

User interface:
- Discover the updated interface, optimized for display on high-resolution monitors. Use more intuitive command definitions to easily interact with Civil 3D


Civil 3D 2019.2
Crossings in profile view:
- Place a marker and label where alignments and feature lines cross a profile

Rail platform edge tool:
- Select the controlling alignment, station locations, and type of rail platform. Platform feature lines update automatically with alignment revisions

Transparent commands:
- Place geometry elements relative to another object with precision through transparent commands


Civil 3D 2019.1
Link topography from Civil 3D to Revit:
- Publish surfaces from Civil 3D to BIM 360 using Autodesk Desktop Connector. Then, reference the topography in Revit

New features for rail design:
- Rail subassemblies supporting cant for XML and offset alignments can improve the track corridor modeling process

Curves and transition spirals alignment:
- Quick center line alignment now enhanced for complex geometry. You can also create a best fit profile above or below existing grade

Optimized performance for DREF elements:
- Streamline your projects with efficiency features, including automatic alerts and updates following DREF elements modifications


Civil 3D 2019
Profiles:
- Offset profiles are more accurate with support for vertical curves

Subassemblies:
- Expanded corridor capabilities with more than 60 additional subassemblies

Sections:
- Represent 3D solid objects more accurately with more control over visual properties

Pressure pipes:
- Meet more design standards with additional fittings and appurtenances