About Creating an Alignment From an Existing Alignment

Create an alignment from all or part of an existing alignment.

This command enables you to use a portion of an existing alignment as a starting point for a new alignment. The selected geometry in the source alignment is converted to line, curve, and transition sub-elements in the new alignment.

This command is useful when you need to perform the following tasks:

• Extract a portion of a source alignment to use as a baseline to create a secondary alignment that merges with or exits from the primary (source) alignment.

  Select a source alignment (1), and then specify a range of chainages (2) to create an alignment (3). Add sub-elements onto the new alignment (4) to create an alignment that merges into or exits from the source alignment.

  
• Explore route alternatives between two sections of a source alignment.

  Select a source alignment (1), and then specify sub-elements (2) from which to create an alignment (3). Add sub-elements onto the new alignment (4) to create an alternative design that is based on the source alignment.

  

Note: You can create the alignment using several, non-contiguous chainage ranges or alignment sub-elements from the source alignment. By default, the chainage values of the new alignment match the chainage values of the source alignment.