UFC 4-022-01
25 May 2005
both vehicles and pedestrians. Some examples of these technologies are x-ray, ion
mobility spectroscopy, gamma ray imaging, and neutron analysis.
Chapter 7 discusses high throughput, high-energy equipment used for truck inspection
and also provides additional information including layout considerations. The inspection
equipment may be mobile or a fixed installation. Mobile units can be randomly used at
any ECFs that have the required space for operation. Either a fixed or mobile unit could
be used on a continuous basis at a large vehicle inspection facility. The design of the
Access Control Zone should include provisions for the future incorporation of these
large scanning devices where possible. The design should include space for vehicle
inspection equipment and provide utility conduits to the anticipated location for future
use.
6-5
CAPABILITY TO REJECT UNAUTHORIZED VEHICLES
Inevitably, unauthorized vehicles will enter the ECF and the design should support
rejecting these vehicles. Minimize the impact on traffic. Vehicles denied entry might be
required to cross several lanes of incoming and outbound traffic to exit the ECF. These
vehicles will require assistance to exit quickly. The assistance will be from security
personnel directing traffic or, if the ECF is automated, through the use of traffic gates to
stop normal traffic.
The roadway should be designed to have the required turning radius to allow a
single movement for the vehicle to be redirected. Consider the need for re-directing,
without major traffic disruptions, a large vehicle that mistakenly enters the wrong ECF.
Where possible, the ECF will accommodate the turning radii of AASHTO WB-50 (WB-
15m) to limit the time necessary for the reject vehicle to leave the entry control facility.
If space is unavailable to support a single movement, consider the impact on the flow of
traffic while a vehicle makes a three-point turn or similar movement. If the impact is
infrequent or acceptable, or large vehicles are not expected at the ECF, then the
required space can be minimized. As illustrated by the functional diagrams, Figures 3-1
through 3-3, two rejection points should be provided; one prior to the central
identification area / gatehouse and the other after this point. Provide a minimum of one
rejection point prior to the final denial barrier.
6-6
GEOMETRIC DESIGN OF ROADWAYS
Base the design of the roadways in the ECF on the latest edition of the GDHS-4 except
as modified in this UFC. See Chapter 7 for requirements specific to large vehicle
inspection operations and facilities. Additionally, consider the requirements to support
oversized, atypical vehicles such as those frequently encountered during construction
operations or during mobilization of military vehicles and equipment.
Traffic and Safety Engineering for Better Entry Control Facilities provides additional
guidance on geometric design of roadways for Entry Control Facilities.
6-6.1
Channelization Islands
6-15
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