A Bi-objective Location-Routing Problem for Hazardous Materials Transportation

Nowadays transporting hazardous materials (Hazmat) through city roads increases and according that, risks of the transportation of Hazmat have grown up and attracted researchers focuses. This paper provides a mathematical model for location-routing problem (LRP) to reducing two important objectives in hazardous materials transportation. The model locates facilities to establish and selects the best paths reaching customers to minimizing two objectives of the problem. Risk is first objective and in prior for all the Hazmat transportation studies. Risk is the probability of Hazmat transportation and population exposure around facilities location and during transportation routes. The second objective is minimizing total costs that contain costs of establishment of located facilities and costs of Hazmat transportation between facilities to customers. Mathematical model minimizes the two objectives for management decisions to satisfy governments, society, environment concerns and reducing probability of fatalities may cause by transportation of hazardous materials. The proposed model is mixed-integer linear programming that coded and solved in GAMS. Applicability of the model determined by a numerical example that showed at the end of the paper.

Keywords:

Hazardous Materials , Transportation , location-routing problem , bi-objective model ,