Using CTM Parameter Lines

The CTM Parameter Lines function significantly narrows down a search by focusing on the most desirable solutions. This function is of great use in complex transit layouts where all inclusive searches take a long time as well as for unattended modes of providing information such as websites and IVR.

On the Parameters tab in the Itinerary Planning screen, the Lines parameter appears similar to the following example:

  1. Click the Value field and then, click the down arrow that appears at the end of the field.

    The Line Selection dialog box opens.

    The Show Dir check box is selected by default.

  2. To remove the Dir (Direction) column from the grid, select the check box.
  3. Select the lines that you want to add to the string. To clear a line, click the check mark beside it.
  4. To apply a mode to a selected line, click the check box beside it until the symbol of the mode you want appears.
    By default, a blue check mark (Required symbol) appears first. See the table at the end of this procedure for the list of modes.
  5. Click OK.

The set of selected lines and their applied modes are shown in the Value field.

The following table lists the modes of line parameter settings.

Mode Dialog Symbol Summary Symbol Use in the Algorithm
None None icon (not shown) No special use.
Suppressed Syppressed icon - (minus sign) Do not consider solutions which include the suppressed line and direction combinations.
Required Required icon + (plus sign) Do not consider solutions which do not include all of the desired lines. Please note that the desired lines make no distinction of the direction. The required lines also count as desired.
Desired Desired icon * (asterisk) Do not consider solutions which do not include at least one of the desired line and direction combinations. The required lines also count as desired.
Strictly Required Strictly Required icon ! Consider only lines that are selected for the itinerary solutions, that is, no other lines are considered.