MedianFlushWithBarrier

This subassembly inserts surfaces to define a flush median with an optional New Jersey Barrier.

The pavement structure follows the standards described in “Pavement Structure of Paved Sections" in the Autodesk Civil 3D Help.

Attachment

The attachment point is at the center of median on the finish grade surface. This component inserts to the left and right side simultaneously.

Input Parameters

Note: All dimensions are in meters or feet unless otherwise noted. All slopes are in run-over-rise form (for example, 4 : 1) unless indicated as a percent slope with a “%” sign.

Parameter	Description	Type	Default
Left Slope	Slope of the left median surface	Selection list	-2 %
Right Slope	Slope of the right median surface	Selection list	-2 %
Include Barrier	True shows the New Jersey barrier. False omits the barrier.	Selection list	Include Barrier
Left Width	Width from the median centerline to the left edge of median	Numeric, positive	1.2 m 4.0 ft
Right Width	Width from the median centerline to the right edge of median	Numeric, positive	1.2 m 4.0 ft
Left Lane - Use Superelevation	Specifies to use superelevation slope for the left lane	Selection list: Yes No	Yes
Default Left Slope	Specifies the default slope of the left lane, if superelevation slope is not specified	Numeric	- 2 %
Right Lane - Use Superelevation	Specifies to use superelevation slope for the right lane.	Selection list: Yes No	Yes
Default Right Slope	Specifies the default slope of the right lane, if superelevation slope is not specified	Numeric	- 2 %
Shoulder Slope Direction	Specifies whether the shoulder slopes away from the crown or towards the crown	Selection List: Away from Crown Towards Crown	Away from Crown
Pave1 Depth	Thickness of the Pave1 layer; zero to omit	Numeric, positive	0.025m 0.083 ft
Pave2 Depth	Thickness of the Pave2 layer; zero to omit.	Numeric, positive	0.025 m 0.083 ft
Base Depth	Thickness of the base layer	Numeric, positive	0.100 m 0.333 ft
Subbase Depth	Thickness of the subbase layer	Numeric, positive	0.300 m 1.0 ft
Dimension A (mm or inches)	Height of the barrier at the center of median	Numeric, positive	810 mm 32 in
Dimension B (mm or inches)	As shown in diagram	Numeric, positive	232 9 in
Dimension C (mm or inches)	As shown in diagram	Numeric, positive	59 mm 2 in
Dimension D (mm or inches)	As shown in diagram	Numeric, positive	125 mm 5 in
Dimension E (mm or inches)	As shown in diagram	Numeric, positive	557 mm 22 in
Dimension F (mm or inches)	As shown in diagram	Numeric, positive	178 mm 7 in

Target Parameters

This section lists the parameters in this subassembly that can be mapped to one or more target objects, such as a surface, alignment, or profile object in a drawing. For more information, see To Specify Corridor Targets.

Parameter	Description	Status
Left Width	May be used to override the fixed Left Width and tie the left edge-of-median to an offset alignment. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines, or survey figures.	Optional
Right Width	May be used to override the fixed Right Width and tie the right edge-of-median to an offset alignment. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines, or survey figures.	Optional

Output Parameters

Parameter	Description	Type
Superelevation Axis of Rotation	Indicates whether the subassembly supports the axis of rotation calculation. To view a description of the parameter, in the Properties window, hover the cursor over the parameter. For more information, see Profile Grade Line Adjustments During Superelevation.	Static (Description)
Left %Slope	% slope of the left side of the median	Numeric
Right %Slope	% slope of the right side of the median	Numeric

Behavior

The pavement structure links are inserted outward left and right of the attachment point for the given widths and slopes. If the Include Barrier value is True, a New Jersey barrier is inserted symmetrically about the median centerline. If alignments are given as target parameters for the Left and Right Widths, the widths are adjusted to tie to the alignment offsets at each station along the corridor.

If the median is in superelevation with a single constant slope across the entire median, the top of the barrier is slanted to match the median slope. Otherwise the top of the barrier remains horizontal. In all cases, the barrier height (Dimension A) is held constant at the centerline of the barrier.

Superelevation Axis of Rotation Support

This subassembly works only with Roadway Types that have a Pivot Method of Median Edges and a Median Treatment of Maintain Median Shape. If you use this subassembly with any other Pivot Method or with Distorted Median Treatment, it will produce a result equivalent to Median Edges with Maintain Median Shape.

Layout Mode Operation

In layout mode, this subasssembly displays all pavement links using the width and depth input parameters at a -2% slope. If Include Barrier is True, the barrier is displayed with the given dimensions.

Point, Link, and Shape Codes

The following table lists the point, link, and shape codes for this subassembly that have codes assigned to them. Point, link, or shape codes for this subassembly that do not have codes assigned are not included in this table.

Point, Link, or Shape	Code	Description
All barrier points	Barrier	All points on the concrete barrier
P1, P3	ETW	Inside edge of lane on finish grade
P2	Crown	Crown of median on finish grade
P4, P6	ETW_Pave1	Edge-of-traveled-way on Pave1
P5	Crown_Pave1	Crown on Pave1
P7, P9	ETW_Pave2	Edge-of-traveled-way on Pave2
P8	Crown_Pave2	Crown on Pave2
P10, P12	ETW_Base	Edge-of-traveled-way on Base
P11	Crown_Base	Crown on Base
P13, P15	ETW_Sub	Edge-of-traveled-way on Subbase
P14	Crown_Sub	Crown on Subbase
L1, L2	Top, Pave
L3, L4	Pave1
L5, L6	Pave2
L7, L8	Base
L9, L10	SubBase Datum
All barrier links	Barrier
S1	Pave1	Area between finish grade and Pave1
S2	Pave2	Area between Pave1 and Pave2
S3	Base	Area between Pave2 and Base
S4	SubBase	Area between Base and Subbase
S5	Barrier	Shape inclosed by the barrier.

Coding Diagram