Additional Barriers. Alternatives to the barriers listed above,
along with a decision tree for vehicle barrier selection and design criteria,
can be found in the NCEL Terrorist Vehicle Bomb Survivability Manual, July
1988. Many of the passive barriers contained in the manual may be more
convenient, suitable, or economical to install than the fence cable vehicle
restraint system. The fence location should drive the actual selection of a
barrier or barrier system. Some examples of active and passive vehicle
Active (pop-up) type vehicle barriers.
Both active ("pop-up") and passive bollards.
Across-the-road bar-type barriers.
Concrete planter boxes, jersey bounces, anchored concrete
Buried heavy equipment tires.
Concrete and concrete block walls.
Sand filled 55-gallon (208.2-liter) drums.
Highway-type guard rails and cable systems.