Inserting a flow bundle

You insert a flow bundle by specifying the network objects via which the paths shall lead (Fundamentals: Flow bundle definition through selection of network objects).

1. On the Graphics menu, click Flow bundle.

The Graphics tools (Flow bundle) window opens and the flow bundle tool is active.

2. In the list specify the desired flow bundle conditions:

You can select network objects via which the paths shall lead (Setting a network object as flow bundle condition).
You can specify the filter conditions that account for the status (active or passive) of the network objects and traffic type (Filtering paths via active and passive network objects and traffic types).
You can define how you want multiple filter conditions combined (Combining flow bundle conditions with AND THEN and OR and Putting AND THEN flow bundle conditions into brackets).
For results generated through simulation-based dynamic assignment, you can specify temporal restrictions (PrT flow bundles with temporal restrictions).

3. If required, make further changes in the Graphics tools (Flow bundle) window.

Element	Description
New set of conditions	Click this symbol to add an OR term (Combining flow bundle conditions with AND THEN and OR).
Duplicate	Click the symbol to duplicate all terms marked in the list.
Delete	Click the symbol to delete all terms marked in the list.
Move downwards / Move upwards	You can change the sequence of rows within a group combined by AND by selecting the desired row and clicking the corresponding symbol.
Reset	Click this symbol to delete the list of objects and all previously executed flow bundles.
Reset to parameters of the last execution	Click this symbol to reset the flow bundle conditions to those of the last calculation. The symbol is only available if you have already carried out a flow bundle calculation and your settings differ from the calculation settings. Note Current filter conditions, e.g. for lines, are not reset.
Insert link bars if required	If this option has been selected, a matching bar with flow bundle volumes will be inserted automatically when executing the flow bundle if none exists yet. Notes If a matching bar already exists, the settings of the reference bar are applied to the new bar. The graphic parameters are always adjusted in such a way that the flow bundle bar is visible.
Alternative routes	If this option has been checked, first all paths will be identified which meet the conditions selected. Origin-destination relations are identified in the next stage. Finally, all paths with this type of origin-destination pair are selected. They, however, do not meet the conditions selected (Fundamentals: Displaying flow bundles). Note If, for example, 60 % of all trips of an OD pair traverse the marked link S, then the alternative routes comprise the trips found for the remaining 40 % of this OD pair.
Add special conditions	Here you can select links for the flow bundle and add further conditions via the small triangle next to the button.

4. Click the Execute icon .

All paths which correspond to the filter settings will be identified. You can display them in a list and visualize the volumes as a flow bundle according to the graphic parameters selected (Displaying flow bundles in lists and Setting graphic parameters for the display of flow bundles).

Note: If you change the flow bundle conditions after an execution, for example the selection of the demand segments, the changes will be highlighted or displayed in the form of information texts.