An integrated framework for bus logistics management: case studies ⋆ J´ozsefB´ ek´ esi 1 , Andrej Brodnik 2 ,Mikl´osKr´ esz 1 , and David Pash 2 1 Institute of Applied Sciences University of Szeged, H-6701 Szeged, POB 396, Hungary, {bekesi,kresz}@jgypk.u-szeged.hu 2 University of Primorska, PINT, Muzejski trg 2, Koper, Slovenia {andrej.brodnik,david.pas}@upr.si Abstract. This paper describes the most obvious way for public trans- portation companies to decrease their operational cost. This is to opti- mize the logistic of their operation. The optimization process is a very complex operation and therefore we split the logistics into three phases: vehicle scheduling, driver scheduling and driver rostering. The phases reflect also the split of a large problem (long term optimization) to the daily operation and finally to individual trips. The individual trips are then grouped into working shifts and to these are scheduled individual drivers. In the paper we present a detail description of bus scheduling. We use its mapping to the multiple depot vehicle scheduling problem (MDVSP) using a time-space network model. Finally, we solve the problem for two different cases – the city of Szeged and city of Ljubljana. 1 Introduction The largest expense of public transportation companies are operational costs which include cost of bus fleet, gasoline and maintenance of the fleet, and salaries for the drivers. Therefore the reduction in operational costs represents a big improvement in their OPEX. One of the most common ways to reduce the cost is the introduction of an efficient computer supported integrated information system. Due to the development of ICT (information and communication technology) nowadays a bus company has its own information system, ensuring a modern business engineering environment. The main functions of these systems are, be- sides business applications like accounting etc., also: preparing bus schedules for lines served by the company, scheduling buses and drivers to serve the lines, tracking and monitoring of bus fleet during the day and notifying the dispatcher ⋆ This research was partially supported by Szeged City Bus Company (Tisza Vol´ an, Urban Transport Division) and by the Hungarian-Slovenian Intergovernmental Pro- gramme for 2008-2009 (project number BI-HU/08-09-012 )