Threat detection: a framework for security architects and designers of metropolitan rail systems

Abstract

Metro rail systems (MRS) currently face a serious threat from terrorist attacks – especially through use of explosives. The threat comes at a time when scores of new MRS are under construction or at the planning stage in cities across the world. Designers of these systems need to consider ways to detect explosives without an adverse impact upon passenger comfort and profitability. This paper presents a framework for designers to identify security functions in MRS, understand current methods of threat detection used in MRS and recognise their relationship with other operational requirements. Application of this framework at the planning stage can assist in designing systems where terrorist threats can be better addressed with reduced impact on passenger experience and MRS operations. The application of a framework of analysis inspired by Ekblom’s work to nine functioning MRS yields a concise representation of the major design issues architects and security specialists have to consider for effective integration of security systems in stations.