ShoulderExtendSubbase

Attachment

The attachment point is at the inside edge of the paved shoulder, which is typically at the outside edge-of-traveled way.

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
Daylight Elevation		Numeric	- 2.452
Daylight Offset		Numeric	15.889
Daylight Slope	The value of the fixed slope of the daylight link, used if the “hold slope” option is used.	Numeric, positive	4 ( : 1)
Side	Specifes to insert the subassembly either on the right or the left side of the attachment point.	Left/Right	Right
Shoulder Width	Width from the attachment point to the shoulder hinge point	Numeric	2.4 m 8.0 ft
Use Superelevation Slope	Specifies to use the slope from the superelevation specification defined on the baseline alignment.	Selection List: No Left Outside Shoulder Left Inside Shoulder Right Inside Shoulder Right Outside Shoulder	No
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
Default Shoulder Slope	Default slope of the shoulder if a superelevation slope is not specified.	Numeric, Grade	-6.000%
Subbase Daylight Type	Select whether to hold the daylight link to a fixed slope with variable width, or hold it to a fixed width with variable slope	Selection list: a) Hold Slope, Adjust Width, b) Hold Width, Adjust Slope	Hold Slope, Adjust Width
Daylight Slope / Width	The value of the fixed slope (x : 1) or fixed width of the daylight link, used if the “hold slope” or the “hold width” option is used.	Numeric, positive	4 ( : 1)
Subbase - Use Superelevation	Specifies to use superelevation slope for the subbase slope.	Selection List: a) Outside shoulder slope, b) Inside shoulder slope, c) No	Outside Shoulder Slope
Default Subbase Slope	Default slope of the subbase if a superelevation slope is not specified.	Numeric, Grade	-6.000%
Pave1 Extension	Width that the Pave1 layer extends beyond the shoulder hinge point. The bottom of the Pave1 layer may not extend beyond the shoulder sideslope.	Numeric, positive	0.0
Pave2 Extension	Width that the Pave2 layer extends beyond the shoulder hinge point. This should be equal to or greater than the Pave1 Extension.The Pave2 layer may not extend beyond the shoulder sideslope.	Numeric, positive	0.0
Base Extension	Width that the Base layer extends beyond the shoulder hinge point. This should be equal to or greater than the Pave2 Extension. The Base layer may not extend beyond the shoulder sideslope.	Numeric, positive	0.0
Pave1 Depth	Depth between finish grade and Pave1 (zero to omit)	Numeric, non-negative	0.025 m 0.083 ft
Pave2 Depth	Depth between Pave1 and Pave2 (zero to omit)	Numeric, non-negative	0.025 m 0.083 ft
Base Depth	Depth between Pave2 and Base (zero to omit)	Numeric, non-negative	0.100 m 0.333 ft
Subbase Depth	Depth of the subbase layer at the attachment point (zero to omit)	Numeric, non-negative	0.300 m 1.000 ft

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	Type of Assignment	Status
Shoulder Width	May be used to override the fixed Shoulder Width and tie the edge-of-shoulder to an offset alignment. The following object types can be used as targets for specifying this offset: alignments, polylines, features lines, or survey figures.	Optional

Output Parameters

Parameter	Description	Type
Daylight Slope	Slope of the daylight link	Numeric
Daylight Offset	Offset of the subgrade daylight point	Numeric
Daylight Elevation	Elevation of the subgrade daylight point	Numeric
Shoulder Width	Width of the paved shoulder	Numeric
Shoulder Slope	Slope of the paved shoulder	Numeric

Behavior

The finish grade of the shoulder is inserted for the given Shoulder Width and Shoulder % Slope outward from the attachment point, and the subbase link is inserted from the attachment point offset starting at the Subbase Depth below the finish grade.

The shoulder daylight link can be inserted with either a fixed slope (Hold Daylight Slope = True) or a fixed width (Hold Daylight Slope = False). If a fixed slope is used, the daylight link is extended from the outside edge of shoulder until it intersects the subbase link. Otherwise the subbase layer is extended for the Daylight Width beyond the outside edge of shoulder, and the daylight link is connected to the end of the subbase.

The Pave1, Pave2, and Base surface links are inserted parallel to the finish grade at the given depths. If the layer Extension values are non-zero, each layer is extended for the given distance beyond the shoulder hinge point. If a layer extends past the daylight slope, the layer is terminated at the daylight slope intersection. Each layer should be as wide or wider than the one above it.

Layout Mode Operation

In layout mode, this subassembly displays the links comprising the shoulder for a normal crown roadway situation. If numeric slope values are given for the Shoulder % Slope and Subbase % Slope, the links are shown at the given slope values. Otherwise the default slopes of -6% are used.

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.

Type	Code	Description
P2	EPS	Edge of paved shoulder, finish grade
P4	EPS_Pave1	Edge of paved shoulder on Pave1
P13	EPS_Pave2	Edge of paved shoulder on Pave2
P7	EPS_Base	Edge of paved shoulder on Base
P11	Daylight_Sub	Subbase daylight point
L1, L2	Top, Pave	Paved finish grade
L4	Pave1
L8	Pave2
L12	Base
L15	SubBase Datum
L14	Top, Gravel	Unpaved finish grade
Other Links	As shown below	Unpaved finish grade
S1	Pave1
S2	Pave2
S3	Base
S4	SubBase