tCur, the time required by a turning vehicle, is calculated from the free-flow turn time t0 in an unloaded network and the saturation of the turn, using a volume-delay function (Fundamentals: Node impedances of turns VD function).
1. For the nodes selected, choose the Turns VDF function for node impedance calculation (Selecting the method for node impedance calculation).
2. Make sure that at the desired nodes, the input attribute values Capacity PrT, t0 PrT and TypeNo are correct for the turns (Managing turns).
3. For each turn type used in the network, select the appropriate VDF (Selecting VDFs for turn types).
4. Calculate the node impedances with an appropriate method (Methods for node impedance calculation).
