Use this window to display and edit many attributes of any given single sub-element within an alignment.
You can use the Alignment Layout Parameters window to change individual lines, curves, and transitions in the alignment. Use this window along with the Alignment Elements vista, which displays all of the sub-elements that make up a given alignment.
You can edit available parameters. You cannot edit parameters that are unavailable (shaded).
If the alignment uses design criteria, then the Alignment Layout Parameters window contains up to three panels that can be collapsed by clicking 
. If design criteria has not been associated with the alignment, then only the Layout Parameters panel is available.
You cannot dock the Alignment Layout Parameters window, but you can pin or resize it.
This window stays open when you grip edit the alignment or enter another command. The window closes when you either delete the currently selected alignment, click the X button in the upper right-hand corner of the window, or click 
on the Alignment Layout Tools toolbar.
Design Speed
Specifies the design speed of the current sub-element.
Design Criteria Panel
The following parameters are displayed only if design criteria has been associated with the alignment.
Use the Design Criteria panel to apply design criteria that is different from the default values that have been set for the alignment. To change a criterion value, click the Value cell in the appropriate row.
A 
warning symbol in the Property column indicates that the sub-element design violates the criteria set in the design criteria file. You can find and correct the specific parameter that has been violated by examining the Layout Parameters panel.
- Minimum Radius Table
-
Defines the minimum radii for a given road type and design speed.
- Transition Length Table
-
A table of values in the Superelevation Attainment Method formulas. You can use the table to calculate the distances between the critical superelevation transition points for different types of carriageways as a function of curve radius and design speed.
- Attainment Method
-
Specifies how superelevation is applied, and the method (crowned or planar) that is used to calculate superelevation transition chainages for different types of carriageways.
Layout Parameters
Use this panel to examine and change the general layout parameters of the selected sub-element.
Click 
Show More to expand the number of parameters that appears in the window. The default, collapsed view displays editable and other important parameters. Use the horizontal and vertical scroll bars when the list is longer or wider than the window.
When a design criteria file has been associated with an alignment, the Constraints column displays the value to which a given parameter is limited. The selected design criteria file defines the constrained values. When a parameter value violates the range displayed in the Constraints column, a warning symbol appears next to the parameter name.
Line
- Element
-
Specifies a number for the Line, in the order of creation.
- Curve Group Index
-
Specifies the curve group description.
- Curve Group Sub-Element Index
-
Specifies the curve group sub-element description.
- Type
-
Specifies either Line, Curve, or Transition as the sub-element type.
- Tangency Constraint
-
Specifies how the element is constrained by other elements: either Not Constrained (Fixed), Constrained By Preceding (Floating), Constrained By Following (Floating), or Constrained On Both Sides (Free).
- Parameter Constraint Lock
-
Specifies whether the parameters associated with the Parameter Constraint property may be edited.
(Locked): Only the parameters permitted by the Parameter Constraint property are enabled for editing. 
(Unlocked): All parameters (with some exceptions) are enabled for editing.
- Parameter Constraint
-
Specifies the number of points in the constraint of the straight.
- Length
-
Specifies the Line length.
Note: You can edit the length of a floating straight that is attached to the end of an element. - Quadrant Bearing
-
Specifies the direction of the line.
- Start Chainage
-
Specifies the starting chainage of the line for the solved portions of the alignment.
- End Chainage
-
Specifies the end chainage of the Line for the solved portions of the alignment.
- Start Point
-
Specifies the XY coordinates for the start point of the Line.
- End Point
-
Specifies the XY coordinates for the endpoint of the Line.
- Pass Through Point1
-
Specifies the XY coordinates of the first user-specified pass-through point.
- Pass Through Point2
-
Specifies the XY coordinates of the second user-specified pass-through point.
Curve (independent or in TCT)
- Element
-
Specifies the curve number relative to the order of creation.
- Curve Group Index
-
Specifies the curve group description.
- Curve Group Sub-Element Index
-
Specifies the curve group sub-element description.
- Type
-
Specifies Curve as the element type.
- Radius
-
Specifies the radius of the curve element.
- Degree of Curvature
-
Specifies the degree of curvature that was calculated for the curve. This value is directly related to the Radius value. It uses the same constraints, and if one changes, the other updates automatically.
- Length
-
Specifies the length of the curve element.
- Pass Through Point1
-
Specifies the XY coordinates of the first user-specified pass-through point.
- Pass Through Point2
-
Specifies the XY coordinates of the second user-specified pass-through point.
- Pass Through Point3
-
Specifies the XY coordinates of the third user-specified pass-through point.
- Center Point
-
Specifies the XY coordinates of the center point.
- Start Chainage
-
Specifies the starting chainage of the curve for the solved portion of the alignment. Unsolved curves do not display a Start Chainage.
- Start Point
-
Specifies the XY coordinates of the start point of the curve.
- End Chainage
-
Specifies the end chainage of the curve for solved portions of the alignment. Unsolved curves do not display an end chainage.
- End Point
-
Specifies the XY coordinates of the endpoint of the curve.
- Direction At Through Point 1
-
Specifies the XY coordinates of the first user-specified pass-through point.
- Direction At Through Point 2
-
Specifies the XY coordinates of the second user-specified pass-through point.
- Greater Than 180 Degrees
-
- Displays True if the curve angle is defined as greater than 180 degrees.
- Displays False if the curve angle is defined as less than 180 degrees.
- Compound
-
- Displays True if the curve is defined as compound to the curve before it.
- Displays False if the curve is defined in the reverse direction to the curve before it.
- Delta Angle
-
Specifies the included angle of the solved portion of the curve.
- External Straight
-
Specifies the distance from either the beginning of the curve (PC) to the intersection point (IP), or from the IP to the end of the curve (TP).
- Chord Direction
-
Specifies the quadrant bearing along the line joining the beginning of the curve (PC) and the end of the curve (TP).
- External Secant
-
Specifies the radial difference from the IP to the midpoint of the curve.
- IP Included Angle
-
Specifies the included angle between the incoming and outgoing straights of the curve.
- Chord Length
-
Specifies the distance along the line joining the beginning of the curve (PC) and the end of the curve (TP).
- Mid-Ordinate
-
Specifies the distance from the midpoint of the curve, perpendicular to the midpoint of the chord.
- IP Chainage
-
Specifies the chainage value of the IP by adding the PC to the IP straight length to the chainage value at the beginning of the curve (PC).
Transition
- Element
-
Specifies the transition number relative to the order of creation.
- Curve Group Index
-
Specifies the curve group description.
- Curve Group Sub-Element Index
-
Specifies the curve group sub-element description.
- Type
-
Specifies Transition as the element type.
- Constraint 1
-
Specifies the transition as either Fixed or Free.
- Constraint 2
-
- Specifies the Transition In, Radius, and Transition Out for free transitions that are part of a Transition-Curve-Transition group.
- Specifies the start point, direction, radius, and length for fixed transitions.
- Transition Type
-
Displays True when the transition has a curve at both ends.
- Start Chainage
-
Specifies the Start Chainage at the transition start.
- Start Point
-
Specifies the XY coordinates of the Start Point of the transition.
- End Chainage
-
Specifies the end chainage for the solved transition portions of the alignment. Unsolved portions do not display an end chainage.
- End Point
-
Specifies the XY coordinates of the End Point of the transition.
- Incurve
-
Specifies the incoming curve radius.
- Length
-
Specifies the length of the Transition.
- A
-
Specifies the A value.
- Compound
-
- Displays True if the curve is defined as compound to the curve before it.
- Displays False if the curve is defined in the reverse direction to the curve before it.
- Radius In
-
Specifies the incoming curve radius.
- Radius Out
-
Specifies the outgoing curve radius.
- Total X
-
Specifies the straight distance between the start point of the incoming transition (TS) and the endpoint of the transition and beginning point of the circular curve.
- Total Y
-
Specifies the perpendicular offset distance between the beginning point of the circular curve (TC) and the incoming straight.
- Short Straight
-
Specifies the distance from the transition point of the horizontal straight intersection (SIP) to the end of the transition (TIP).
- Long Straight
-
Specifies the distance from the transition start (TS) to the transition point of horizontal straight intersection (SIP).
- P
-
Specifies the offset distance from the incoming straight to the beginning point (PC) of the shifted circular curve.
- K
-
Specifies the abscissa between the transition start point (TS) and the beginning point of the shifted circular curve.
- Transition Definition
-
This read-only field specifies the transition definition. If the alignment is created using the Alignment Layout tools, or converted from AutoCAD entities, then the transition definition for these transitions is specified as one of the following values: Clothoid, Bloss, Cubic (JP), Cubic Parabola, Sinusoidal, Sine Half-Wavelength, Bi-Quadratic.
If the alignment is created using a dynamic offset alignment command, the transitions have a special geometry based on the parent alignment transitions definition with the offset parameter. So, for dynamic offset alignments, the transition definition can be specified as one of the following values: Offset Clothoid, Offset Bloss, Offset Cubic (JP), Offset Cubic Parabola, Offset Sinusoidal, Offset Sine Half-Wavelength, Offset Bi-Quadratic.
- IP Included Angle
-
Specifies the included angle between the incoming and outgoing straights of the curve.
- TIP Chainage
-
Specifies the chainage value of the TIP. Adds the tangential distance from the transition start (TS) to the TIP to the chainage value of the TS.
- TIP Northing
-
Specifies the XY coordinates of the transition point of horizontal straight intersection.
- TIP Easting
-
Specifies the XY coordinates of the transition point of horizontal straight intersection.
- TIP Included Angle
-
Specifies the angle representing the difference in direction of the incoming straight and the outgoing straight of the transition.
- Radial Point Northing
-
Specifies the coordinates of the transition northing.
- Radial Point Easting
-
Specifies the coordinates of the transition easting.
Design Checks
The Design Checks panel displays the name and contents of the design check set that is associated with the alignment.
When the sub-element design violates a design check, a warning symbol appears next to the affected design check.