where u [0, 1] is a weighting factor to impose the relative importance between the pathway length and its ADT.
A community (or government decision makers) can assign different values to u based on
their preferences in order to obtain the ‘‘best” measure to their specific situation.
For the illustration presented in the subsequent section, we simply apply equal weights, i.e., u = 0.5. Note that the summation of all wk(i, j) for a given O–D pair (i, j) equals K (i, j) , the total number of IPWs between nodes i and j.