Network objects generated in Visum from the Vissim export

Visum generates:

• a PrT transport system
• a PrT mode
• a PrT demand segment
• Vehicle types or vehicle classes from Vissim are not exported as different transport systems, modes or demand segments.
• An additional DSeg-PrT is generated for each evaluation interval of the dynamic assignment from Vissim to Visum, when exporting routes from Vissim.

Nodes are created according to the Vissim node.

The Visum node numbers correspond to the Vissim node numbers.

The maximum permitted node number in Visum is 2,147,483,647. Vissim nodes with a higher number are renumbered. The new numbering starts with the smallest free Vissim node number. Properties of nodes, for example, type, geometry, signaling, orientation, etc., are neither exported nor generated.

Links are generated according to the Vissim edges between the nodes.

Parallel edges: In Vissim several edges are possible between two adjacent nodes. If there are several edges between two nodes, only the shortest edge is exported. The Vissim network structure is checked in the process. If the modeling is not suitable, a warning is issued, for example, for parallel edges. Details are shown in the Messages window.

Link numbers start with 1.

Thus the numbering of links does not correspond to the Vissim link number or the number of another Vissim network object.

The link type is set to 0 for all links.

Thus the link type does not correspond to the link behavior type of Vissim links.

The length of link is calculated from the corresponding Vissim edge.

The number of lanes is set to the minimum number of lanes of all Vissim links and connectors which belong to the edge.

NumberVeh/h = Number of lanes • 900

Capacity = Number Veh/h • (simulation duration/3,600)

Duration = Simulation time (Defining simulation parameters)

Corresponds to "Vehicles per simulation time"

v0 IV is calculated based on speed distributions of Vissim origin parking lots and the desired speed distribution per edge.

Speed for a distribution: 85 percentile

• Only the default speed distribution is taken into account for parking lots.
• For speed decisions, the average of all distributions is calculated: 85 percentile of each individual distribution

Turns are generated from the Vissim edges within the node. A Visum turn is permitted if the corresponding Vissim edge exists. The capacity is set to 99,999 for all turns. U-turns are assigned type 4, other turns are assigned type 0.

Zones are created according to the Vissim zones. The zone position is calculated from the position of the parking lot which is assigned to the zone.

Zone connectors are created according to the Vissim parking lots and zones.