Node impedance of nodes VD function
In this model, turn delays are calculated in two steps. First, a node delay is calculated by applying a VD function to the vol/cap ratio of the node. Each turn penalty is the sum of node delay and the turn-specific time (calculated with VD function set for turns). Node delay only has an affect on turns from a non-prioritized approach. These approach links have to be marked with the attribute TModelSpecial (User Manual: Junction editor and signal control).
The attributes listed in Table 98 are considered for the calculation.
Turn time penalties are calculated according to the following formulas:
Vol(k) = ∑Vol(a)
delay(n) = VDF (cap(n), vol(n))
delay(t) = VDF (cap(t), vol(t))
IF n has no link with TModelSpecial = 1, THEN
tCur(t) = delay(t) + delay(n) for all turns t via node n
IF n has at least one link with TModelSpecial = 1, THEN
tCur(a) = delay(t) for all turns t with a 'from link' to which TModelSpecial = 0 applies
tCur(a) = delay(t) + delay(n) for all turns t with a 'from link' to which TModelSpecial = 1 applies