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Vertical Curvature

Use this dialog to create or edit the geometry for vertical curvature.

Where can I find the dialog?

In the toolbox, select the Vertical Curvature icon.

Using the Dialog

You can edit the geometry using two methods: either through the properties dialog or by using Grips.

Note that there will be a link to the requirements in the road standard (N100) if a design class is selected in the SFI Properties dialog.

During editing, you can enable or disable helper options for the dynamic line. The icon for helper options (dynamic text and helper geometry) is located on the status bar at the bottom left.

Editing via the Object's Properties Dialog

When editing via the properties dialog, you can enter points and roundings manually in the dialog or dynamically on the screen.

1) Manual Editing

Manual entry in the dialog is done by adding angle points with radius.

Fremgangsmåte

  1. Select Show dialog from the context menu (right mouse button).
  2. Right-click and select Add...
  3. Enter the elevation for the starting point.
  4. Right-click and select Add...
  5. Enter the profile number and elevation for angle point 1.
  6. Continue in the same way for all angle points and the endpoint.
  7. Select the first angle point, right-click, and choose Edit...
  8. Enter the elevation for the angle point, select the rounding type (circle or parabola), and the corresponding parameter.
  9. Continue in the same way for the rest of the angle points. Note that you can exchange data between the vertical curvature dialog and, for example, Excel using the Copy and Paste functions from the right-click menu. Remember to select everything, including "Vertical Align," when copying data back from Excel.

The curve points are calculated automatically from the angle point elevations and roundings.

You can also enter the curve points for the vertical curvature by using Edit as curve element in Excel.... In some cases, the vertical curvature can be described this way. You must always start and end with a straight line element.

Fremgangsmåte

  1. Select Edit as curve element in Excel... in the dialog.
  2. Enter the profile number, elevation, and radius for the start of the line.
  3. Enter the first curve point (radius = 0).
  4. Enter the second curve point (radius = nnn).
  5. Continue with the rest of the curve points and finish with the last point on the line.
  6. Close Excel and save.
  7. The program converts the description to profile number, elevation, and radius for the angle points.

Example

2) Dynamic Editing

Fremgangsmåte

  1. Activate Insert point from the context menu.
  2. Point and left-click in the longitudinal profile to register the starting point, angle points, and endpoint.
  3. Lock the slope for the stretches as needed (locked slopes are marked with S in the lock column).
  4. Deactivate the icon for inserting points after all points are registered.
  5. Point and left-click on the first angle point (the point is marked with a small cross on the screen).
  6. Select Insert/edit rounding from the context menu and specify the desired rounding.
  7. Select the next angle point and enter a new rounding. Continue until all angle points have the desired rounding.

How to Insert a Point on an Existing Line?

Instructions

  1. To continue the line from the last point: Click next to the endpoint. If the dialog is open, you will see that the empty line below the last point in the list is selected. Then right-click and select Insert point.
  2. To insert a point between two existing points: New points are inserted before the point you select. The point is marked with a small black cross in the vertical curvature. If the dialog is open, you will see that the point is selected in the list. Select the point on the screen and choose Insert point.

Editing via Grips (Using Handles)

Grips are especially useful when you want to edit the geometry of an existing vertical curvature. The icon to enable or disable grips editing is on the toolbar.

By pointing and clicking on the vertical curvature when Grips is active, some points are highlighted with a symbol. You can grab and move these handles directly.

Tip

When you point to a handle, a tooltip appears explaining what happens when you left-click the point. Other relevant options appear when you right-click.

Warning

Be aware that you do not have an undo option in the same way as when using the dialog. Once you have moved a point with grips, you cannot click cancel to ignore the change.

Info

You can always use Discard changes in the SFI dialog to restore the last change if you made a mistake with grips editing.

Checking Against the Road Standard (N100)

When constructing a vertical curvature in an SFI model with an active design class, the user receives information about the requirements in this class, such as max. gradient, min. radius in crest, and min. radius in sag.

Note

You can override these requirements if needed, but deviations from the road standard should be documented in the project.

Connection in Intersection Areas

In intersection areas, you must connect to another road, and it is natural to attach to this at point 1 and point 2 (advanced section will show the road body to connect to).

You will then be notified that the minimum radius is too large, but you have the option to continue without a radius.

If needed, you can also add a small radius here afterward.

Visualization of Deviations

When you open the dialog for an existing vertical curvature in longitudinal profile editing or presentation drawing for the longitudinal profile, a check is also performed as long as the road model contains a design class.

Deviations are displayed graphically at the bottom of the longitudinal profile window, where the colors indicate the type of error and the profile area the errors are represented in:

  • Yellow: Min./max. resulting slope
  • Magenta: Max. gradient
  • Green: Min./max. vertical curvature radius

The color display helps you identify where you need to make adjustments to meet the requirements in the road standard.