ABSTRACT
Allocating security resources is essential on both intra-and inter-modal levels. On an intramodal dimension, the authorities or the companies responsible for the transport have to decide on which transportation routes, belonging to the same mode, available between point A and point B, security measures have to be taken. This decision regarding security resources allocations should take into account all existing and feasible uni-modal transportation routes between A and B and it should be repeated for every dangerous freight the authorities or the companies wish to investigate. On an inter-modal dimension, the different available modi for transporting a certain hazardous cargo between A and B should be investigated and security resources need to be allocated
1 INTRODUCTION
Daily shipments of dangerous goods are critical to global economies. However, these transportation activities involve a variety of security risks. In case of incidents, dangerous freights would obviously attract the attention of the general public, policymakers and industrialists. Therefore, both for the responsible government and the private authorities, it is essential to efficiently secure these hazardous transports. Since a lot of stakeholders are involved in a chemical supply chain, it is not easy to adequately and efficiently securing it. Moreover, while the unintentional accident likelihood depends on (relatively) well-known parameters such as maintenance of infrastructure, speed characteristics and the presence of junctions, the intentional accident likelihood relates to much less known factors such as vulnerabilities, consequences, and intentions.
