Defining driving behavior in a driving behavior parameter set

Warning: Driving behavior parameters control the driving behavior and can therefore lead to a considerable change in the simulation results! Change the driving behavior parameters only if you are a very experienced user!

In order to take into account the different driving behavior of vehicles, specific properties are combined in representative driving behavior parameter sets. By default, the following driving behavior parameter sets may be pre-defined. Their attribute values each represent a typical type of driving behavior:

• Urban (motorized)
• Slow lane rule (motorized)
• Outside of city (free lane selection)
• Footpath (no interaction)
• Cycle path (free overtaking)

You can define additional driving behavior parameter sets and attribute values that meet your requirements.

If the following driving behaviors have been predefined, you can simulate typical driving behaviors of autonomous vehicles:

• AV cautious (CoEXist): The vehicle complies with road traffic regulations and takes on a safe driving behavior at all times. The vehicle always applies the attribute Enforce absolute braking distance and thus maintains a relatively large distance to other vehicles (Editing the driving behavior parameter Following behavior), (Editing driving behavior parameters autonomous driving). The vehicle may cross non-signalized intersections and change lanes.
• AV normal (CoEXist): The driving behavior of the autonomous vehicle is comparable to the driving behavior of non-autonomous vehicles. In addition, a sensor system in the vehicle can detect the vehicle’s distance to other vehicles in the vicinity and the speed these vehicles are driving at.
• AV aggressive (CoEXist) (all knowing): Aware of the entire traffic situation and equipped with a traffic situation prognosis, the autonomous vehicle is capable of leaving only minimum gaps to other vehicles. This driving behavior leads to cooperative driving.

You can edit individual driving behavior parameters on the Autonomous driving tab (Editing driving behavior parameters autonomous driving).

Note: Driving behavior parameters, which represent the driving behavior of autonomous vehicles, are saved to the example file AV Base Settings.inpx. You can read this file into your network via the the commands File > Read additionally > Network. Additional information can be found in the example description file AV Base Settings.pdf.

Changing driving behavior parameters during simulation run

You can change driving behavior parameters during the simulation. However, you cannot change Safety distance reduction factor start (signals) or Safety distance reduction factor end (signals).

Assigning a link behavior type to a vehicle class

For each vehicle class, you can assign a driving behavior parameter set to a link behavior type. To assign links to the desired default link behavior type, use the Link behavior type attribute (Defining link behavior types for links and connectors), (Attributes of links). You can assign an individual link behavior type to each lane of a link. Vehicles using a lane assigned to a link behavior type will take this link behavior type into account.

Defining driving behavior

1.  On the Base Data menu, click > Driving Behaviors.

The Driving Behaviors list opens. Some driving behavior parameter sets can be predefined. The Attributes list is displayed as the left of two coupled lists.

2.  Right-click in the list.

3.  On the shortcut menu, click Add.

A new row with default data is inserted.

The Driving Behavior window opens.

4.  Enter the desired data.

Element	Description
No.	Unique number of the driving behavior parameter set
Name	Name of driving behavior parameter set
Driving behavior attributes for the following types of behavior: Following (Editing the driving behavior parameter Following behavior) Car following model without interaction or according to Wiedemann 74 or Wiedemann 99 (Editing the driving behavior parameter car following model), (Defining the Wiedemann 74 model parameters), (Defining the Wiedemann 99 model parameters) Lane change (Applications and driving behavior parameters of lane changing), (Editing the driving behavior parameter Lane change behavior) Lateral behavior(Editing the driving behavior parameter Lateral behavior) Signal controller(Editing the driving behavior parameter Signal Control) Autonomous driving (Editing driving behavior parameters autonomous driving) Driver errors (Editing the driving behavior parameter driver error) Meso: Driving behavior parameters for mesoscopic simulation (Editing the driving behavior parameter Meso)

5.  Confirm with OK.