In the TRIBUT-Equilibrium_Lohse procedure, you can use restricted traffic areas. For restricted traffic areas of the type matrix toll, you have to explicitly specify a toll for each possible relation of cordon nodes and per transport system. A cordon node is a (main) node at the edge of the restricted traffic area. On the one hand, it is connected to links of a restricted traffic area and, on the other hand, to links that are not part of the restricted traffic area, or to a connector. Visum provides all relations of cordon nodes in a list.
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Note: For two reasons it is advisable to limit the number of cordon nodes and thus, the number of relations. On the one hand you save calculation time, and on the other hand, you need to define less tolls. To reduce the number, you can take the following measures:
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1. Make sure that your model contains a restricted traffic area of the type matrix toll (Creating a restricted traffic area).
2. Open the toll matrices list (Opening a list).
3. On the toolbar of the list, click the button next to the Restr. traffic area label.
4. Select one or more restricted traffic areas.
5. Confirm with Confirm selection.
The list automatically contains all relations of cordon nodes of the selected restricted traffic areas. If you allocate further links to the restricted traffic area, the list is updated automatically.
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Notes: If you synchronize the list with the Network editor window, the items that belong to the currently selected relation are highlighted in the Network editor window. Multiple routes (=straps) can be part of a relation, depending on the entry and exit link and also on the transport system. In the list, you can display different characteristics of the straps as attributes. If you edit particular characteristics of the network, like for example closing links or changing speeds, the most recently calculated straps may not represent the shortest routes any more. To recalculate the straps and update the corresponding values in the list, click the Recalculate straps button. Additionally you can specify that straps shall be recalculated automatically whenever needed, for example, to display the length (menu Edit > User Preferences > entry Network > Matrix toll > option Recalculate straps automatically). Prior to an assignment, which takes restricted traffic areas into account, the straps are always recalculated automatically. |
6. In the Toll_PrTSys and Toll reverse direction-PrTSys columns, for each transport system and relation, enter the desired tolls.
7. Specify the tolls for all restricted traffic areas of the type matrix toll.
The settings for the matrix toll are specified.
