VISSIM 5.30-05 User Manual

8 Simulation and Test
If the VISSIM network was changed between saving and loading the snapshot
file, the behavior of VISSIM is undefined (it might even crash).
The snapshot file does not yet include simulation of pedestrians data.
Definition
To create a snapshot file follow the steps outlined below:
1. Run the simulation.
2. Select Single step mode at the time when a snapshot file should be
created.
3. Go to SIMULATION – SAVE SNAPSHOT and enter the desired file name.
To continue a simulation from a snapshot file follow the steps outlined below:
1. Ensure that the corresponding network file (*.INP) has been loaded and
no simulation is active.
2. Go to SIMULATION – LOAD SNAPSHOT and choose the desired file name.
3. Continue the simulation.
The simulation then continues as if it was not interrupted. Any evaluations
that should begin after the start time of the snapshot file will be evaluated as
usual.
8.1.3 Multirun Simulation
Use the multirun simulation feature to automatically run multiple simulation
runs.
Typical applications are:
► Variation of random seed
► Dynamic Assignment iterations
► Successive increase of traffic demand with Dynamic Assignment
In contrast to single simulation runs the particular case-specific parameter
(e.g. random seed) is changed for every simulation run of a multirun
simulation.
For other settings please refer to:
► Simulation parameters (cf. section 8.1.1) and
► Dynamic Assignment settings (cf. section 12.8.6).
For output of the desired evaluation files, these need to be selected and
configured via EVALUATION - FILES prior to the multirun start.
For Dynamic Assignment all settings need to be done in TRAFFIC - DYNAMIC
ASSIGNMENT prior to the multirun start.
454 VISSIM 5.30-05 © PTV AG 2011