Normally Deployed Active Barrier Safety System
[NOTE TO DESIGNER.
1. Include drawings showing the control switches and control logic for this
scheme. Use Drawing E1.07 in the Standard Design or provide a new drawing if
the control switches on Drawing E1.07 are modified. If the controls are
modified from Drawing E1.07 and the control sequences described below,
provide narrative descriptions of the controls in the same detail as provided
2. Include drawings showing locations of all required features including
Gatehouse, Guard Booths, active vehicle barriers, stop lines, traffic
signals, vehicle presence detectors, signs, and pavement markings.]
1 NORMALLY DEPLOYED SYSTEM FEATURES. Provide the following features for the
Barrier Normally Closed Safety System:
1.1 One or more sets of Active Vehicle Barriers in the inbound and outbound
lane or lanes. Each set of barriers will consist of an initial and final
barrier(s) separated by a selected distance to form an entrapment area, in
which either the initial barrier(s) or final barrier(s) is always closed.
1.2 Passive barrier on a raised island separating the inbound entrapment
area from the outbound entrapment area to prevent vehicle crossover.
1.3 Passive barriers along the ACP corridor to contain vehicles within the
1.4 One three-light Traffic Signal located on each side of each active
vehicle barrier (or roadway if there is more than one barrier across the
roadway) as shown on the Drawings. The three lights in each Traffic Signal
shall be Red-Yellow-Green top to bottom.
1.5 A 2 foot wide stop line placed 10 feet in front of each barrier(s) as a
driver normally approaches the barrier(s).
1.6 Vehicle presence detectors located immediately before and immediately
after each barrier. Presence detectors can be induction loops, video motion
sensors, or other suitable technologies capable of sensing vehicle presence.
1.7 One Master Control Panel and one Guard Booth Control panel for each
Guard Booth along with all control switches and indicating lights as shown on
the Drawings. The Master Control Panel will normally be located in the
Gatehouse for use by the lead ACP guard.
1.8 [NOTE TO DESIGNER. If actuated traffic arm(s) is not required, delete
this paragraph. See Standard Definitive Design drawings for Barrier Normally
Closed schemes with and without actuated traffic arms.] An Actuated Traffic
Arm for each inbound lane in the ID Check Area. ATAs shall be installed near
the Guard Booths as shown on the Drawings. An ATA Control Panel with Open
and Close control switches for the ATA shall be provided and mounted on the
back wall of the Guard Booth below the back window.
2 BARRIER CONTROL SWITCHES.
2.1.1 Per the Drawings, the active vehicle barrier control system shall have
one Control Power On/Off switch, one key operated 3 position Manual - Auto -
Local mode selector switch for the Inbound Barriers, one key operated 3
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