Editing the driving behavior parameter Lateral behavior
By default, in Vissim a vehicle uses the entire width of the lane. You can define in the driving behavior and parameters-lateral behavior, whether the vehicles in a lane can drive on the left, on the right or in the middle without specifying a lateral orientation. If the lane is wide enough and the attributes in the section Default behavior when overtaking vehicles on the same lane or on adjacent lanes allow for overtaking on the same lane, overtaking maneuvers on a single lane are also possible. If the maximum deceleration prevents the overtaking vehicle from braking in time, it overtakes the other vehicle if possible, even if this is not allowed by the driving behavior parameters Consider next turning direction and Minimum lateral distance. Improper overtaking therefore takes precedence over a collision.
In addition, these settings are used when the option Observe adjacent lane(s) is selected.
1. On the Base Data menu, click > Driving Behaviors.
The Driving Behaviors list opens. Some driving behavior parameter sets can be predefined.
You can edit all driving behavior parameters for lane change, lateral behavior and following behavior in the list or in tabs with the following steps.
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Note: In lists, you can use the |
By default, you can edit the list (Using lists).
2. Right-click the entry of your choice.
3. On the shortcut menu, click Edit.
The Driving Behavior window opens.
4. Select the Lateral tab.
5. Make the desired changes:
| Element | Description | ||
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Desired position at free flow |
Desired position at free flow (DesLatPos): Lateral orientation of a vehicle within its lane while it is in free traffic flow. If you change the traffic rules in the network settings, Vissim will change the attribute values Right to Left and Left to Right (Selecting network settings for vehicle behavior). |
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Observe adjacent lanes |
ObsAdjLns:
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Diamond shaped queuing |
DiamQueu: |
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Consider next turning direction |
ConsNextTurn: In case of non-lane-bound traffic enables a lateral behavior that accounts for another vehicle as follows: Option Consider next turning direction also considers the attribute Desired Direction of the next connector of the route of the vehicle (Attributes of connectors). If, for example, left has been selected for this attribute, the vehicle only passes another vehicle on the right if that vehicle turns at the same connector at the latest. If the vehicle is within the lane change distance defined in the Lane change attribute (Lane change distance), it moves laterally on its lane to the respective side if there is sufficient space. Simultaneously, vehicles which do not want to turn in the same direction on the same connector or some time before it, do not try to overtake the vehicle on that side, since this would cause a collision at the next intersection. The vehicle flashes if the option Consider next turning direction is selected and the vehicle changes lanes within the Lane change distance defined in the Lane change attribute and the attribute Left or Right of the connector is selected.
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Collision time gain |
Minimum collision time gain (MinKCollTimeGain): Minimum value of the collision time gain for the next vehicle or signal head, which must be reached so that a change of the lateral position on the lane is worthwhile and will be performed. The collision time is calculated based on the desired speed of the vehicle. The default value for collision time gain is two seconds. Smaller values lead to a livelier lateral behavior, since vehicles also have to dodge sideways for minor improvements. Default 2.0 s |
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Minimum longitudinal speed |
Minimum longitudinal speed for lateral movement (MinSpeedForLat): Minimum longitudinal speed which still allows for lateral movements. Default value 3.6 km/h. A smaller value, e.g. 1 km/h ensures that vehicles can also move laterally if they have almost come to a halt already. |
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Time between direction changes |
Lateral direction change - minimum time (Lateral behavior) (LatDirChgMinTm): Standard 0.0 s: defines the minimum simulation time which must pass between the start of a lateral movement in one direction and the start of a lateral movement in the reverse direction. The higher this value, the smaller are the lateral movements of vehicles. These lateral movements only take place if overtaking on the same lane is permitted. Lateral movement for a lane change is not affected by this parameter. Default 0 s |
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Default behavior when overtaking vehicles on the same lane or on adjacent lanes |
This applies for all vehicle classes, with the exception of the vehicles classes listed under Exceptions for overtaking vehicles of the following vehicle classes.
The minimum lateral distance is multiplied by the stochastic value z:
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Exceptions for overtaking vehicles of the following vehicle classes |
Behavior for specific vehicle classes that deviates from the default behavior when overtaking vehicles on the same lane or on adjacent lanes. When modeling traffic that is not lane-bound, you can select vehicle classes which may be overtaken within a lane by vehicles of this driving behavior set. 1. Right-click in the list. 2. On the shortcut menu, click Add. A new row with default data is inserted. 3. Make the desired changes:
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If this option is selected, vehicles account for the position and lateral orientation of other vehicles on adjacent lanes and keep the 
If this option is not selected, vehicles on adjacent lanes are ignored even if they are wider than their lanes, except when they perform a lane change.