Visualizing turn values

You can visualize turn values in 2D mode. Turn values represent the values of result attributes or user-defined attributes along the turn relations in a node. In addition, movements that you have selected in the Movements list are visualized in color (Attributes of nodes). In the Network editor, you can visually compare turn values that arise in one or multiple nodes.

Selecting attributes for visualization

In the graphic parameters of the network object type Node, when you configure the display settings for turn values, you select two attributes (Configuring turn value visualization):

• An attribute whose value Vissim visualizes using the color of the turn value. Each color is assigned to a class. You can select the value range for each class.
• An attribute whose value Vissim visualizes using the width of the turn value. You can select the scaling of the width. Vissim can also display the attribute value numerically, at the beginning and end of each turn value. In this case, th following elements must be selected large enough. Otherwise not all or no numerical values are displayed:

• the section of turn value visualization
• the value for Turn value bar width (maximum):
• the magnification in the Network editor

In addition to numeric attribute values, you can show total values (Configuring turn value visualization). Circular segmental arches separate the total values from the numeric attribute values.

Activate turn value visualization

To visualize turn values in the Network editor, in the graphic parameters of the network object typeNode, select Turn value visualization.

The node attribute Object visibility also controls the visibility of turn values.

In addition, you can activate turn value visualization for each node of your choice (Activate turn value visualization). This allows you to compare turn values that arise in one or multiple nodes during or after a simulation run. During the simulation run, turn values are visualized based on the interval set for the evaluation of the node.

Selecting node evaluation

To perform a Node evaluation, first select the attribute Collect dataa (Evaluating nodes). For each node whose turn values you want to visualize, select the Use for evaluation attribute.

The node-edge graph must be created for node evaluation (Generating a node-edge graph).

Graphical display of turn value visualization

Elements from outwards tow inwards:

Light blue circle with blue outline	Defines the range of the turn value visualization. You can enlarge or reduce this area (Editing the size of turn value visualization for a node).
Arrow tip	Shows the direction of travel.
Value next to the arrow tip	If the light blue circle is sufficiently large: Sum of the attribute values of turn value bands for each input and output
Circle segment arc	Separates arrow tips and sums from attribute values.
Circle segment	Dark gray: highlights turn values of turn relations that lead into the node. Light gray: highlights turn values of turn relations that lead out of the node.
Value between circle segment and turn value band	If the light blue circle is sufficiently large: numeric attribute value at the beginning and end of each turn value band.
Turn value band	Each turn relation in the node, from entry to exit, is represented by a turn value band. The width at the beginning and end and the color are based on the configuration of turn value visualization and the values of the selected attributes (Configuring turn value visualization). In order to avoid overlapping turn value bands during visualization, their width is reduced in the middle. The width of that part of the band is not used to visualize any values. Width and color of the turn values displayed already change during simulation, as they are based on values determined using the interval set for node evaluation.

Example:

The graphic shows a turn value visualization with the following settings:

• Color of turn values: The values of the attribute Vehicle delay (VehDelay) have been classified based on the color scheme  Relative delay.
• Width of turn values: Used to visualize the values of the attribute Vehicles (Veh).
• The number at the beginning of a turn value shows the attribute value Vehicles (Veh) that Vissim determines at the beginning of a turn relation in the node. Accordingly, the number at the end shows the attribute value that Vissim determines at the end of the turn relation in the node. Vissim automatically shows or hides the figures depending on the selected enlargement of the network in the Network editor.