The content of the book fits to the teaching program of the subject titled 'Decision making methods' taught at Budapest University of Technology and Economics (BME) Faculty of Transportation Engineering and Vehicle Engineering. The book firstly introduces the most frequently applied general approaches of solving linear optimisation problems and then discusses a few special decision support models. In the course of the investigation the book discusses the models from theory to practice, especially considering transportation related problems and models. The introduced models can efficiently support transportation related decision making processes. Therefore, it can fructify for its readers in the field of transportation management, transportation process coordination and transportation system operation.