Uncontrolled nodes

For uncontrolled nodes the impedance of a turn is calculated using a VD function from the node volume (= Sum of turn volumes) and the node capacity, therefore exactly like calculating the model Nodes VD function (Node impedance of nodes VD function), however without a term for each turn.

The Visum attributes listed in Table 96 are considered for calculation.

Table 96: Attributes for calculation of uncontrolled nodes

Network object	Attribute	Description / Effect
Node	Capacity PrT	The total capacity of the node in PCUs / hour
Node	t0 PrT	The time required in a turning movement (all equal) in unloaded state
Turn	ICA average back of queue	Average queue length