25 May 2005
Table 6-1 Estimated Vehicle Throughput (SDDCTEA Data except as noted)
No Direct Checks
20-120, typ. 60
20-120, typ. 60
Traffic Arm w/
Signs, markings and signals are necessary to perform traffic control and satisfy
regulatory requirements and should be provided in accordance with Service guidance
and the MUTCD. Due to the increase in use of automation and channelization of traffic,
guide signs in the approach zone will become increasingly important to indicate lane
use and direct traffic into the appropriate lanes.
Limited use of signs in all zones and especially in the access control zone is strongly
encouraged. Signs in the Access Control Zone may obstruct the guard's view of
approaching traffic. Use overhead guide signs when the gate has three or more lanes,
with varying functional use in each lane (Traffic Engineering and Highway Safety
Bulletin: Traffic Engineering for Better Gates.) Ensure position of signage does not
interfere with visibility of security personnel, especially the overwatch position. Vehicles
approaching the ECF should be informed of their approach to a restricted area. This
may require coordinating signage on feeder roads with state or local officials.
Traffic and Safety Engineering for Better Entry Control Facilities provides additional
information on traffic control at Entry Control Facilities.
It is also desirable to manage the speed of traffic in inbound and outbound lanes of the
ECF for safety. Clearly post the speed limit in the ECF. Use geometric roadway layout
features or other traffic control devices such as "rumble strips" or warning strips, caution
signs, or traffic or flashing lights in the response zone to manage the speed of traffic
and increase awareness of the final denial barrier system.