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M <br />Table 5. Requirements for Existing and Planned Devices (continued) <br />M M M <br />Device <br />• Video detection is currently used at 5 traffic signals <br />Video and data from 4 of the existing video detection <br />systems are not currently transmitted to the center. Video <br />from the 7'" /Jefferson video detection system is currently <br />Video Detection <br />transmitted to the Roosevelt hub. <br />• The ultimate communications network must support video <br />and data from the video detection system. The video <br />quality transmitted to the center should be sufficient to <br />configure and monitor detection zones. <br />• Approximately 6 existing system detectors (loops) <br />Existing system detectors communicate directly with a <br />• See Appendix E for numerous system detectors included <br />traffic signal controller and the communications between <br />in the 20 -year Regional ITS Plan <br />the controller and the central signal system computer <br />System <br />support the transfer of data <br />Detectors <br />• New system detectors (video or inductive loops) may <br />either be connected to a traffic signal controller or be <br />added to the communications network by a separate <br />channel <br />Ramp Meters <br />The Regional ITS Plan includes ramp meters on Beltline <br />• Same requirements as traffic signals. These devices will <br />Hwy, Delta Hwy, and 1 -105. <br />not be owned by the City. <br />• 4 existing cameras on and near the Ferry Street Bridge <br />• Need to transmit video and a data channel for camera <br />that use RS422 communications <br />control <br />• See Appendix E for numerous cameras included in the <br />Existing Conditions <br />20 -year Regional ITS Plan <br />• Existing video and camera control are carried on existing <br />• "Camera control' refers to the ability of the user to <br />copper twisted pair cables using a proprietary protocol. <br />pan /tilt/zoom (PTZ) or focus <br />Future Conditions <br />• Camera control typically uses RS-422 or RS -485 data <br />channels, which can be digitized in an IF video stream or <br />CCTV Cameras <br />carried as a separate low speed data channel <br />• Camera control may be transmitted as serial data or may <br />be included in the UDP /IP data stream with digital video <br />• Video may be carried as an analog or digital signal. Digital <br />IP video is recommended because its quality in recent <br />years is comparable to traditional analog video signals <br />and it provides the most flexible network design for <br />sharing video with other agencies and posting it on the <br />Internet. Video will drive the network design because it <br />requires the most bandwidth. <br />