Recommended Practice

Random Counterterrorism Measures on Transit Systems


This recommended practice describes the flexible and scalable application of security measures, including patrol and visibility tactics, to deter potential terrorists from committing attacks on transit systems.

Document History
Document Number Version Publication Date Publication Related Information
APTA SS-SRM-RP-006-11 Rev. 1 07/29/2022 Published Current
APTA SS-SRM-RP-006-11 03/31/2011 Published Superseded


counterterrorism, antiterrorism, patrols, security, transit


Random counterterrorism measures (RCM) are a tactic that transit agencies can deploy to deter attacks on their systems by creating uncertainty in the planning process used by potential terrorists. These types of security measures are flexible and scalable in nature and can be conducted alongside other security tactics, as well as implemented as part of an agency’s response to a heightened security posture. As applicable, transit agencies, law enforcement and/or other security personnel should collaborate and implement appropriate RCM.

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