Wang, David Z.W.; Lo, Hong K. - In: Transportation Research Part B: Methodological 44 (2010) 4, pp. 482-492
The road network design problem, typically formulated as a bi-level program or a mathematical program with equilibrium constraints, is generally non-convex. The non-convexity stems from both the traffic assignment equilibrium conditions and the non-linear travel time function. In this study, we...