Guidelines for Roving Security Inspections in Public Venues Using Explosives Detection Dogs grew out of the March 2004 synchronized bombing attack of commuter trains in Madrid, Spain. These guidelines were developed by the T&DI Task Committee on Roving Security Inspections following a teleconference sponsored by the Transportation and Development Institute of ASCE, the Transit Standards Consortium, and the Infrastructure Security Partnership. These guidelines were built on best practices for security in mass transit, and expanded to include other public venues. This publication offers the current thinking of experts in this field and specific instructions for an approach that covers unannounced and frequent inspections of buildings, facilities, and public spaces, therefore eliminating the need to inspect every venue during every hour of operation. This book includes the following sections: definitions; situations; auspices, purpose and benefits; and policy. It will be valuable for those involved in transportation and public safety and security.