Parameters of direct assignment

If this option has been checked, the demand matrix of the selected demand segment is recalculated. If the demand segment is not connected to a demand matrix (Connecting demand matrices and demand segments), a new demand matrix is automatically created.

Note

The demand matrix data result from the path volumes read from file with the ridership data sets (Num Pass). In the ridership data file, a projection factor (ExtProjFactor) can be entered for each data set. The values are multiplied when being read from file. In this way, passenger weighting performed outside of Visum can be regarded for the direct assignment.

Select this option to calculate the skim matrices selected in the Skim matrices tab (Settings for PuT skim matrix calculation).

Note

You cannot calculate the following skims because the direct assignment does not store the required parameters for calculation.

• perceived journey time, impedance and utility
• extended transfer waiting time
• adaptation time and extended adaptation time
• equivalent journey time
• service frequency
• number of operator changes

Origin zones

Via these entries you may restrict the calculation to the demand of the selected origin zones. You therefore only use the public transport paths that start in these zones.

Note

If both input fields are empty, Visum uses all public transport paths from the plausibility check procedure.

If only a single zone number is entered, Visum will use this value as the upper or lower limit respectively (half-open interval).

Considered OD pairs

Use this list box to restrict the amount of analyzed OD pairs to active OD pairs, active origin zones, or pairs of active zones only.

Note

The options Origin zones and Analyzed OD pairs can be combined.