VISSIM 5.30-05 User Manual

Initial Solution from VISUM
During the automatic VISUM assignment calculation, warnings, notes and
process messages are recorded in the protocol file. Call the protocol file
window via menu HELP – LOG WINDOW.
12.9.2 Manual VISUM Assignment Calculation
The steps of the automatic VISUM assignment calculation can be performed
manually one by one. This approach allows for additional VISUM network
editing prior to the calculation.
Workflow of the manual calculation
Prior to the Export step it is recommended to run a simulation in VISSIM. In
this way it can be guaranteed, that the VISSIM network contains paths for all
OD pairs with demand > 0.
1. In VISSIM: Export network data and demand data via menu FILE -
EXPORT – VISUM – NODES/EDGES… for assignment calculation in VISUM,
cf. section 6.2.2.1.
2. In VISUM: Open the VISUM version file *.VER that has been created
during VISSIM export to VISUM.
3. In VISUM: Perform the desired changes to the network.
In VISUM, the network topology is not subject to changes, since
otherwise the import of VISUM routes might fail in VISSIM.
The network topology is not affected by the following modifications:
- Editing link attributes (type, length, PrT capacity, v0 PrT)
- Editing the link polygon course
- Editing node attributes (type, PrT capacity, t0 PrT, control type)
- Editing the node geometry/orientations
- Editing the node coordinates
- Signal control definition (via Junction Editor).
The folowing modifications in VISUM could cause the route import in
VISSIM to fail:
- Create/Delete nodes
- Edit node number
- Create/Delete links
- Create/Delete connectors
- Open blocked links (Changes to the TSys setings of links)
- Open blocked turns (Changes to the TSys settings of turns)
- Open blocked connectors (Changes to the TSys settings of
connectors)
- Create/Delete TSys/Modes/DSeg
4. In VISUM: Calculate the assignment.
User Manual © PTV AG 2011 649