ABSTRACT
In the last chapter examples were given of methods for solving combined location – distribution – assignment models. The first example of a correct solution to the problem used a nonlinear mathematical programming formulation to solve for the location – distribution portion of the problem (solved by using GAMS) and another nonlinear mathematical programming formulation to solve for the UE (user-equilibrium) trip-assignment portion of the problem (by using the Frank-Wolfe algorithm). The two portions of the problem were linked together by an approach suggested by Evans (1976), in which the Frank-Wolfe algorithm was again used to solve the combined problem.
