Applying preconfigured traffic behaviors

Note: You must have an automotive license.

You can change the settings for the driving style and weather conditions that affect the surrounding traffic of the ego vehicles that entered your Vissim network.

Applying the preconfigured traffic behavior affects your base data and attributes (Impact of preconfigured traffic behavior).

Note: Preconfigured driving styles and weather conditions interact. If you have already applied preconfigured traffic behavior to the Vissim network, changing and applying it again will overwrite the changes made for delays and speeds. Changes in driving style regarding misconduct and the willingness to exploit comfort-oriented or aggressive gaps in traffic are not overwritten. The combination of aggressive driving styles with bad or very bad weather conditions increases the likelihood of unrealistic interactions and collisions during the simulation run.

Select and apply driving style and weather conditions

1. On the Traffic menu, click > Apply preconfigured traffic behaviors.

The window Apply preconfigured traffic behaviors opens.

2. Make the desired changes:

Element	Description
Driving style Preconfiguration	Sets the driving style type applied by the preconfigured traffic behaviors function. ► Select the desired entry: Very comfort oriented Comfort oriented Neutral Aggressive: The ego vehicle encounters more challenging situations than with a neutral driving style for all traffic participants. Very aggressive Vissim adjusts the values of the following objects based on the selected driving style. The surrounding traffic exhibits corresponding behavior during the simulation run. Accelerations and decelerations Gap times and conflict areas Curve speeds Driver Errors Aggressiveness during lane changes, including duration and especially frequency on highways. Gap times Speed distributions
Adjust all speeds	Sets the speed factor used by the function applying the driving style presets. This factor either reduces or increases the speed of every vehicle in the Vissim network during the simulation compared to the standard value of 0 %. At a standard value of 0%, each vehicle operates at the speed calculated by Vissim based on the car following model.
Lack of attention and driver errors	Defines the driver error type set by the function that applies the driving style presets: Attentive: Standard behavior Inattentive: Increases the likelihood of collisions Very inattentive: Significantly raises the likelihood of collisions Vissim does not simulate collisions. Instead, it increases the probability of vehicles coming into contact with each other during the simulation.

Element

Description

Driving style Preconfiguration

Sets the driving style type applied by the preconfigured traffic behaviors function.

► Select the desired entry:

Very comfort oriented
Comfort oriented
Neutral
Aggressive: The ego vehicle encounters more challenging situations than with a neutral driving style for all traffic participants.
Very aggressive

Vissim adjusts the values of the following objects based on the selected driving style. The surrounding traffic exhibits corresponding behavior during the simulation run.

Accelerations and decelerations
Gap times and conflict areas
Curve speeds
Driver Errors
Aggressiveness during lane changes, including duration and especially frequency on highways.
Gap times
Speed distributions

Adjust all speeds

Sets the speed factor used by the function applying the driving style presets. This factor either reduces or increases the speed of every vehicle in the Vissim network during the simulation compared to the standard value of 0 %. At a standard value of 0%, each vehicle operates at the speed calculated by Vissim based on the car following model.

Lack of attention and driver errors

Defines the driver error type set by the function that applies the driving style presets:

Attentive: Standard behavior
Inattentive: Increases the likelihood of collisions
Very inattentive: Significantly raises the likelihood of collisions

Vissim does not simulate collisions. Instead, it increases the probability of vehicles coming into contact with each other during the simulation.

You can define weather conditions:

3. Make the desired changes:

Element	Description
Weather conditions Preconfiguration	Sets the degree of bad weather conditions applied by the preconfigured traffic behavior function. ► Select the desired entry: Bad weather Very bad weather Vissim adjusts the values of the following objects based on the selected weather conditions. The surrounding traffic exhibits corresponding behavior during the simulation run. Speed distributions Curve speeds Deceleration Gap times Visibility
Reduce all decelerations	Sets the deceleration factor used by the function applying the driving style presets. This factor either reduces the speed of every vehicle in the Vissim network during braking compared to the standard value of 0 %. At a standard value of 0%, each vehicle brakes at the speed calculated by Vissim based on the car following model. The reduced deceleration prolongs the distance necessary to stop.
Limit all maximum speeds	Sets the speed factor used by the function applying the driving behavior. This factor either reduces or increases the maximum speed of every vehicle in the Vissim network during the simulation compared to the standard value of 0 %. At a standard value of 0%, each vehicle operates at the maximum speed calculated by Vissim based on the car following model. Cannot be used to increase the speed. Areas in distributions that exceed this parameter are redistributed so that the maximum speed is not exceeded.
Adjust 3D graphic parameters	If this option is selected, sky texture or fog mode in the 3D graphic parameters of the network editor will be set according to the selected weather condition.

4. Confirm with OK.

Applied changes include driving style, driver errors, weather conditions and adjusted speeds. If selected, sky texture or fog mode in the 3D graphic parameters of the network editor will be transferred.

5. If needed, save the network under a new name.

6. Configure your desired evaluations.

7. Start the simulation (Running a simulation).

8. Modify driving style settings as needed, restart the simulation, and analyze the results.