Subassembly Reference

These topics describe the construction and behavior for each subassembly included in the Corridor Modeling catalogs. For more information on subassemblies, see About Subassemblies.

The subassemblies in this subassembly reference are organized alphabetically into the following sections:

Subassembly Reference - BasicBarrier through LaneTowardCrown (this section)
Subassembly Reference (continued) - LinkMulti through OverlayWidenWithSuper1
Subassembly Reference (continued) - RailSingle through UrbanSidewalk

For information about PKT subassemblies that are included with Autodesk Civil 3D, see the Subassembly Reference for Autodesk Civil 3D PKT Subassemblies.

Topics in this section

Introduction to Subassemblies
Autodesk Civil 3D subassemblies are preconfigured AutoCAD drawing objects that let you design three-dimensional sections of roadways and other corridor-type structures.
Subassemblies at a Glance
Review this topic to determine which subassemblies you may want to use in your designs when building corridor assemblies.
BasicBarrier
This subassembly creates a two-sided New Jersey barrier on a roadway surface.
BasicCurb
This subassembly creates a a simple curb at the edge of roadway. It can be attached to either outside edge of pavement or to the edge of a median on the inside.
BasicCurbAndGutter
This subassembly creates a a simple curb and gutter structure at the inside or outside edges of roadway.
BasicGuardrail
This subassembly creates a simple guardrail shape on the assembly.
BasicLane
This subassembly creates a simple lane.
BasicLaneTransition
This subassembly creates a simple lane with finish grade and subbase, where the edge-of-traveled-way can be tied to an alignment or profile.
BasicShoulder
This subassembly creates a simple paved shoulder with finish grade and subbase.
BasicSideSlopeCutDitch
This subassembly is used to close from the edge of roadway to a daylight point in both cut and fill conditions.
BasicSideWalk
This subassembly is used to insert links defining a concrete sidewalk with optional boulevards.
BridgeBoxGirder1
This subassembly creates a simple box girder bridge shape with optional half-barriers.
BridgeBoxGirder2
This subassembly creates a two-chamber box girder bridge shape with optional half-barriers.
Channel
This subassembly creates an open channel with optional lining and backslope links.
ChannelParabolicBottom
This subassembly creates an open channel with a parabolic bottom, with optional lining and backslope links.
ConditionalCutOrFill
This subassembly automatically applies various subassemblies, such as generic links, widening, ditching, or daylighting subassemblies, to an assembly based on whether a cut or fill condition exists.
ConditionalHorizontalTarget
This subassembly automatically applies various subassemblies, such as widening, curb and gutter, ditching, or daylighting, to an assembly based on whether an offset target is found at the corridor station.
CrownedLane
This subassembly creates a crowned lane that has separate subbase slope control, as well as the ability to control the subbase crown location by specifying a target alignment.
DaylightBasin
This subassembly inserts links to create a basin and cut daylight slope for a cut condition, or a basin, berm, and fill slope for a fill condition.
DaylightBasin2
This subassembly is similar to the DaylightBasin subassembly with the following additional behaviors:
DaylightBench
This subassembly inserts links to create cut or fill catch slopes with repeating benches as needed.
DaylightGeneral
This subassembly is a generalized solution to closing the sections from the outside edge of roadway to cut or fill intercept point.
DaylightInsideROW
This subassembly inserts a daylight solution that will use a typical slope as long as the daylight is within the ROW limits.
DaylightMaxOffset
This subassembly inserts a link that extends to a target surface at a user-defined cut or fill slope.
DaylightMaxWidth
This subassembly inserts a link that daylights to a target surface at a user-defined cut or fill slope.
DaylightMinOffset
This subassembly inserts a link that daylights to a target surface at a user-defined cut or fill slope.
DaylightMinWidth
This subassembly inserts a link that daylights to a target surface at a user-defined cut or fill slope.
DaylightMultiIntercept
This subassembly is used when a cut or fill daylight slope may have more than one intersection with the target surface.
DaylightMultipleSurface
This subassembly lets you specify three surface layers and cut slopes for each material type.
DaylightRockCut
This subassembly lets you select both an existing ground surface and a rock surface as targets. Depending on the position (above or below), the daylight will use varied slopes and ditching solutions. In fill and non-rock-cut conditions, this subassembly will behave the same as the BasicSideslopeCutDitch subassembly.
DaylightStandard
This subassembly creates corridor-side daylighting links with user-defined slope configurations, such as flat, medium, and maximum slopes for cut and fill situations.
DaylightToOffset
This subassembly inserts a daylight link from the attachment point to a given offset from the baseline.
DaylightToROW
This subassembly inserts a daylight link from the attachment point to a given offset from the right-of-way limit on a target surface.
Ditch
This subassembly inserts a flat or V-shaped ditch with user-defined horizontal and vertical control parameters.
GenericPavementStructure
This subassembly creates a simple pavement structure with user-definable point, link, and shape codes.
LaneBrokenBack
This subassembly creates a cross-sectional representation of travel lanes for a broken-back roadway, where the inside and outside lanes have different downward slopes.
LaneFromTaperedMedian1
This subassembly inserts one or more travel lanes outward at a constant grade from an alignment that defines the edge of a median that tapers to allow for left-turn lanes.
LaneFromTaperedMedian2
This subassembly inserts one or more travel lanes outward from an alignment that defines the edge of a median.
LaneInsideSuper
This subassembly creates a cross-sectional representation of finish grade, base layer, and subbase layer for a travel lane, applying the Inside Lane superelevation slope value for the corridor model’s baseline alignment.
LaneInsideSuperLayerVaryingWidth
This subassembly creates a cross-sectional representation of a lane comprised of multiple layers. The layers can be of varying widths. It also applies the Outside Lane superelevation slope value for the corridor model's baseline alignment.
LaneInsideSuperMultiLayer
This subassembly is similar to the LaneInsideSuper subassembly. However, there are additional layers within this subassembly, and the bottom layer does not follow the same slope as the finished grade. Instead it is controlled by an inside height and outside height.
LaneOutsideSuper
This subassembly creates a cross-sectional representation of a travel lane, applying the Outside Lane superelevation slope value for the corridor model’s baseline alignment.
LaneOutsideSuperLayerVaryingWidth
This subassembly creates a cross-sectional representation of a lane comprised of multiple layers. The layers can be of varying widths. It also applies the Outside Lane superelevation slope value for the corridor model's baseline alignment.
LaneOutsideSuperMultiLayer
This subassembly is similar to the LaneOutsideSuper subassembly. However, there are additional layers within this subassembly, and the bottom layer does not follow the same slope as the finished grade. Instead it is controlled by an inside height and outside height.
LaneOutsideSuperWithWidening
This subassembly inserts a travel lane, applying the Outside Lane superelevation slope value, and widens the pavement at superelevated regions.
LaneParabolic
This subassembly creates a cross-sectional representation of finish grade, pavement, and subbase for urban, parabolic lanes between the left and right edges of traveled way.
LaneSuperelevationAOR
This subassembly creates a cross-sectional representation of a travel lane, applying the Outside or Inside Lane superelevation slope value for the corridor model’s baseline alignment.
LaneTowardCrown
This subassembly creates a cross-sectional representation of a travel lane that is being inserted from the inside edge of pavement towards the crown point.