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Topic Name: RAND study develops rail security planners and policymakers which cost-effectively prevent terrorist attacks
Category: Integrated Systems
Research persons: RAND Study Team
Location: RAND Corporation, United States
Details
A RAND Corporation study issued today
gives rail security planners and policymakers a framework to develop
cost-effective plans to secure their rail systems from terrorist attacks.
More than 12 million Americans travel on passenger-rail lines each weekday,
and because of its open nature, rail transit is considered an attractive
terrorist target. While there have been no successful attacks on U.S. rail
systems recently, attacks on passenger-rail systems around the world -- such as
the London Underground in 2005 -- highlight the vulnerability of rail travel and
the importance of rail security for passengers.
The study by RAND, a nonprofit research organization, uses a generic
intracity rail system with characteristics similar to existing American systems.
An interdisciplinary team of RAND researchers identified 17 security improvement
options -- such as canine teams, vehicle surveillance systems, and blast
resistant containers -- and assessed their relative effectiveness when deployed
in different parts of the rail system.
“Millions ride the nation’s railways every day, and it is critical to
protect them from terrorist attacks. But we need ways to do so while getting the
most for the money we invest,” said Jeremy Wilson, the study’s lead author.
“By design, rail systems are open and accessible by large numbers of people,
and for this reason are difficult to secure.”
The framework RAND researchers developed gives transit officials a guide to
help them evaluate their systems and determine the best, and most efficient,
ways to improve safety. The study is based on a composite system in order to
avoid disclosing confidential details about any specific rail system in the
United States.
Brian Jackson, co-author of the report, said terrorists have demonstrated the
ability to change strategies and tactics in response to security measures. As a
result, passenger-rail officials and policy makers need to adapt in order to
protect their riders.
“Rather than providing a static defense, security planners should review
their plans regularly to ensure that they remain relevant to any changes in the
terrorists’ targeting methods,” Jackson said.
The study focuses on addressing vulnerabilities and limiting consequences,
the two components of risk rail security measures can most influence.
Additionally, researchers focused on intracity heavy rail
systems—characterized by high speed and rapid acceleration cars, such as the
Metro in Washington, D.C., MARTA in Atlanta and the Red Line in Los
Angeles—and did not include light rail or commuter rail, such as Amtrak.
The study finds that 80 percent of the worldwide attacks on rail systems were
bombings, followed by sabotage (6 percent) and armed attack (6 percent).
Explosives accounted for 77 percent of the weapons used in rail system terrorist
incidents, with 8 percent of the incidents involving hoaxes or threats.
Using the generic rail system as the intended target, researchers took data
on past terrorist attacks on rail systems from the RAND-Oklahoma City National Memorial
Institute for the Prevention of Terrorism (MIPT) Terrorist Incident Database
to develop a risk assessment.
Researchers examined 11 potential attack locations in a rail system, such as
underground infrastructure, ground-level stations, and elevated rail lines, and
subjected them to eight different forms of attack, including bombings,
incendiaries, and unconventional weapons.
Among the lessons learned:
Security measures must address the threat of explosive devices, but not
exclusively; while attacks such as those from chemical and radiological weapons
are unlikely, their potentially serious results mean they merit attention.
- Most terrorist attacks on rail systems have resulted in few or zero
deaths; as a result, even if security measures prevent only the
largest-scale attacks, they could significantly reduce the human costs
associated with the threat.
- Some rail attack modes are more of a concern than others. For example, the
use of small explosives is a high or medium risk for most targets, while
hoaxes or threats pose only a risk for a few targets.
- Because terrorists who are trying to kill and injure people target densely
populated areas, attacks inside train cars, targeting train cars from
outside, and in densely populated stations are of major concern.
- Co-author Jack Riley warns that rail security experts cannot count on
terrorists to repeat the past.
“While it isn’t practical, or desirable, to base security planning on
every conceivable terrorist threat, it’s important that security personnel not
limit their planning to the obvious attacks from the past,” he said. “We
simply can’t be certain what terrorists will do next.”
Researchers identified four broad categories of cost-effective security
measures for system operators to consider in terms of effectiveness per dollar
payoffs:
- Relatively inexpensive solutions with the highest effectiveness, such as
enhanced security training.
- Additional inexpensive solutions to consider with reasonable levels of
effectiveness; for example, installing retractable bollards at entrances and
exits of the central system operations center and power plant.
- Relatively more expensive solutions with highest effectiveness, such as
installing fixed barriers at curbsides adjacent to all entrances and
passageways leading to ground-level and underground stations.
- Relatively expensive longer-term solutions for future consideration, such
as rail vehicle surveillance systems.
Wilson cautions that the options that arise from an analysis using the
framework are specific to the particular system analyzed and the analysis
captures a point in time. As a result, the appeal of each option is influenced
by cost and perceived effectiveness.
The research was sponsored by an award from the National
Institute of Justice, the research, development and evaluation arm of the U.S.
Department of Justice.
The research was conducted by RAND Infrastructure, Safety and Environment,
which conducts research and analysis to improve the development, operation, use
and protection of society’s essential man-made and natural assets, and to
enhance the safety and security of individuals in transit, at work and in their
communities.
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