Edit a Horizontal Alignment

Edit a horizontal alignment (HAL) by adding, removing, inserting, and modifying either horizontal segments or curves at Points of Intersection (PIs), depending on how the alignment was initially defined.

Note: You can only edit one alignment at a time. If you have multiple alignments selected, only the active alignment (indicated in bold in the Project Explorer) appears in the Alignment Editor.

Prerequisites:

To access the options below:

  1. If you have just created an alignment, skip to a procedure that you want to perform below. Otherwise, select an alignment and do one of the following:
    • Select Create Alignment in Corridors > Alignment.
    • Pick an alignment in a graphic view, right-click and select Edit from the context menu.
    • Select an alignment in the Project Explorer, right-click and select Edit from the context menu.

    The Alignment Editor displays.

  2. At the top of the Alignment Editor, there is a list of alignments in your project. Click the Unlock icon and the arrow to open the list. Select the alignment you want to edit and click the Lock icon to lock the list again. This will prevent you from editing the wrong alignment.
  3. Click OK.

To change settings for entering alignment values:

  1. Click the Project Settings icon at the top of the Alignment Editor. The Project Settings for alignments display.
  2. Change any setting formats to match the formats used in the engineering design.
  3. Click Units and then Station in the left pane. Change the station format to match your data.
  4. Click OK.

To add a segment or a curve at a PI:

  1. Select a segment or curve at PI type in the Type cell of the last row in the editor (denoted by the *). The type that you select determines which values you can enter in the row's other cells. For descriptions of the options, see Horizontal Alignment Options.
  2. Press [TAB] or [Enter] to advance to the next cell.
  3. Enter values in each of the cells (based on the type of segment you chose) as specified in the engineering design.

    Note: When entering values, you can always right-click in the Plan View for COGO and snap options.
    Note: If your engineering design shows values in a format different that the Alignment Editor is using, click the Project Settings icon to access the Project Settings dialog where you can change the display formats and entry methods.

  4. Repeat the previous steps until you have created segments or curves at PIs for the entire HAL.

    Note: Visually check the alignment in the Plan View as you enter values.

To edit an existing segment or curve at a PI:

  • To change a segment's type, click in its Type cell and select a new type from the list. Confirm that the values in the other cells for the segment are still correct.
  • To change a value, click its cell and specify a new value. The alignment updates in the Plan View as you make changes.
  • To Undo, Cut, Copy, Paste, and Delete values, click in the cell, then right-click and select an option from the context menu.
  • To access Insert Row, Delete Row, Copy, Alignment Project Settings, and Float View commands, click at the beginning of a row, then right-click and select an option from the context menu.
  • To run the Alignment Geometry Report, right-click anywhere in the editor and select Report from the context menu.

To create a vertical alignment:

  • See To enter a vertical alignment's starting point in Create an Alignment in Corridors > Alignment.

To enter station equation values:

To base HAL segments on an existing line:

  1. Select the line that you want to create the HAL from (or append to your current HAL segments) in a graphic view.
  2. Right-click and select Append selected object in the context menu. The segments from the line are added as new rows in the Alignment Editor.

Related topics

Horizontal Alignment Options

Edit a Vertical Alignment

Edit an Alignment's Station Equations