Quick start guide Dynamic assignment

The Quick start guide contains the most important steps and settings required for dynamic assignment, after you have modeled the Vissim network. The principle of dynamic assignment is illustrated in a flow chart (Flow diagram dynamic assignment).

1.  Define the nodes required for dynamic assignment (Modeling nodes), (Defining nodes):

• in the areas whose dynamic assignment data you want to evaluate or whose turn values you want to visualize
• at the beginning and end of edges on which there are parking lots for zone connectors

2.  Ensure that for these nodes, the attribute Use for dynamic assignment is selected.

3.  Define the zones between which you want the vehicles to drive in the Vissimnetwork (Defining zones).

The number of zones defines the dimensions of the OD matrix.

4.  Define the OD matrix (Modeling traffic demand with origin-destination matrices), (Defining an origin-destination matrix).

5.  For the OD matrix, select the attributes Time from and Time to.

6.  In the matrix edtior, for the OD matrix, enter the volumes for each zone (Editing OD matrices for vehicular traffic in the Matrix editor).

7.  In your Vissim network, define the parking lots for zone connectors.

Vehicles drive from and to the these parking lots (Defining parking lots for dynamic assignment).

8.  Assign each of these parking lots a zone of your choice (Defining parking lots for dynamic assignment).

9.  In the parameters of dynamic assignment, select the desired matrix or matrices (Attributes for the trip chain file, matrices, path file and cost file).

10.  Generate the node-edge graph (Generating a node-edge graph).

11.  If desired, configure evaluations (Performing evaluations), (Overview of evaluations).

12.  If desired, visualize turn values (Visualizing turn values).

13.  Ensure that the desired simulation parameters have been set (Defining simulation parameters).

14.  Start the simulation (Selecting the number of simulation runs and starting simulation).