Profile Layout Parameters Dialog Box

Use this dialog box to analyze and modify profile data in a layout profile.

When the Profile Elements vista and the Profile Layout Parameters dialog boxes are open, click any table row of VIP or sub-element data in the Profile Elements vista to display the data in the Profile Layout Parameters dialog box. The data populates the Profile Layout Parameters dialog box in a vertical layout that you may find more convenient for analysis.

If VIP Based is selected in the Profile Layout Tools, the Profile Layout Parameters dialog box displays VIP data. If Element Based is selected, the Profile Layout Parameters dialog box displays element data.

You cannot dock the Profile Layout Parameters dialog box, but you can pin or resize it.

This window remains open when you grip edit the profile or enter another command. The window closes when you either delete the currently selected profile, click the X button in the upper right-hand corner of the window, or click on the Profile Layout Tools toolbar.

Note: A Total Curve Length property is available in the Profile Entities Vista and Profile Layout Parameters dialog box when you're using the Entity Based view in the Profile Layout Tools.

The Total Curve Length value shows the total vertical curve length, whereas the Length property shows the length of the solved portion of the curve geometry, such as when straights are attached along the curves.

• The Total Curve Length property is available for all vertical curves.
• The Total Curve Length property is editable for fixed circular and fixed parabolic vertical curves that you create by specifying a high or low point.

Editing Parameter Values in the Profile Layout Parameters Dialog Box

You can edit available parameters by clicking in the Value column. If a parameter is uneditable, its name and values are displayed in a gray color.

When Element Based is selected in the Profile Layout Tools, you can unlock and change the constraint type of free circular and parabolic vertical curves in the Profile Layout Parameters dialog box.

By default, the sub-element Constraint Type Desc on the Layout Parameters Panel is uneditable. However, you can edit the Constraint Type Desc for free circular and parabolic vertical curves if you change the Parameter Constraint Lock setting from False to True. When you change the Constraint Type Desc setting, relevant values that apply to the constraint type become editable in the dialog box.

Note: Unlocking and changing the constraint type is supported for free circular and parabolic vertical curves that are created with the Free Vertical Curve (Parabolic), Free Vertical Parabola (VIP Based), Free Vertical Curve (Circular) and Free Circular Curve (VIP Based) commands.

Design Speed

Displays the design speed of the current sub-element. The design speed is set in the properties of the parent alignment.

Note: If multiple speeds are assigned to a sub-element, then the highest speed is used to look up constraint values from the design criteria file and to validate the design checks. This ensures the safest design for that sub-element.

Panels in the Profile Layout Parameters Dialog Box

If the profile uses design criteria, then the Profile Layout Parameters dialog box contains up to three panels that can be collapsed by clicking . If design criteria has not been associated with the profile, then only the Layout Parameters panel is available. If a sub-element violates the specified design criteria, a warning symbol is displayed next to sub-elements that violate the specified design criteria.

Design Criteria Panel

The following parameters are displayed only if design criteria has been associated with the profile.

Use the Design Criteria panel to apply design criteria that is different from the default values that have been set for the profile. 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 the specific parameter that has been violated by examining the Layout Parameters panel.

Minimum K For Stopping Sight Distance

Specifies the minimum K value for stopping sight distance at the specified design speed.

Minimum K For Overtaking Sight Distance

Specifies the minimum K value for overtaking sight distance at the specified design speed.

Minimum K For Headlight Sight Distance

Specifies the minimum K value for headlight sight distance at the specified design speed.

Layout Parameters Panel

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 appear 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 a profile, 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.

Note: The constraint definition for each profile element determines the parameters that are displayed in the Layout Parameters panel.

Design Checks Panel

The Design Checks panel displays the name and contents of the design check set that is associated with the profile.

When the sub-element design violates a design check, a warning symbol appears next to the affected design check.

Note: The Design Checks panel is available only for profiles that use a design check set.