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首页> 外文会议>78th Annual Meeting of the Transportation Research Board in January 1999 >Evaluation of Mobile Surveillance and Wireless Communication Systems Field Operational Test
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Evaluation of Mobile Surveillance and Wireless Communication Systems Field Operational Test

机译：移动监控和无线通信系统现场运行测试评估

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From June 1994 through September 1998, the California Department of Transportation and FHWA conducted a field operational test (FOT) to evaluate the benefits a mobile surveillance and wireless communication system provides in support of freeway surveillance, ramp cation system provides in support of freeway surveillance, ramp metering, and arterial traffic management. Six surveillance and three ramp meter trailers were designed and built for deployment in areas where permanent detectors, electrical power, and landline communications are not available. A retransmission or relay site and data reception equipment for use at traffic management centers and research facilities also were installed. The major components of the surveillance and wireless communication system are black-and-white cameras that supply imagery and data to video image processors; color pan, tilt, and zoom surveillance cameras; narrow and wideband spread spectrum radios; 170 controllers; video compressors; and a trailer-based power distribution system. An independent evaluation of the FOT was conducted in accordance with FHWA guidelines. The FOT showed that the trailers could be effective aids to traffic management when site survey and selection guidelines developed during the FOT are followed and trailer maintenance is perforined. At the trailer location used in the tests, the measured traffic flow parameters and compressed video imagery were able to provide local-responsive ramp metering onto a freeway main line during periods of heavy traffic and video imagery that facilitated control of arterial traffic signals. Data were effectively shared among state and city traffic management centers and university research facilities over spread spectrum radio links.
机译：从1994年6月到1998年9月，加利福尼亚州交通运输部和FHWA进行了现场操作测试（FOT），以评估移动监控和无线通信系统为高速公路监控提供的好处，斜道系统为高速公路监控提供支持，坡道计量和动脉交通管理。设计和制造了六个监视和三个坡度计拖车，以部署在无法使用永久探测器，电力和陆线通信的区域。还安装了用于交通管理中心和研究设施的重传或中继站点以及数据接收设备。监视和无线通信系统的主要组件是向视频图像处理器提供图像和数据的黑白摄像机。彩色平移，倾斜和变焦监控摄像机；窄带和宽带扩频无线电； 170个控制器;视频压缩器；和基于拖车的配电系统。根据FHWA指南对FOT进行了独立评估。 FOT表明，遵循FOT期间制定的现场调查和选择指南并进行拖车维护时，拖车可以有效地辅助交通管理。在测试中使用的挂车位置，所测量的交通流量参数和压缩的视频图像能够在交通繁忙和视频图像时段提供对高速公路干线的本地响应坡道计量，这有助于控制交通信号。州和城市交通管理中心以及大学研究机构之间通过扩频无线电链路有效地共享了数据。

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