Closed Circuit Television (CCTV) is an essential element of visual surveillance for Intelligent Transportation Systems (ITS). It consists of various elements including the CCTV camera unit, a controller cabinet housing the control equipment and the communication system which connects the camera to a control center. The primary objective of a CCTV camera is to provide surveillance of freeway/highway segments or intersections and visual confirmation of incidents. CCTV is becoming more popular in major metropolitan areas. Since full coverage of all freeways or all intersections in an urban area would be cost-prohibitive, siting of CCTV cameras needs to be determined strategically based on a number of factors including traffic volumes, accident concentration, geometry, grade, visual obstructions, availability of a maintenance pullout area, communication cost, cost of providing electrical power, ease in mounting and need to confirm Changeable Message Sign (CMS) messages. Once a CCTV camera is mounted in the field, it is expensive to relocate. Therefore, thorough consideration needs to be given in the design to ensure proper siting and mounting. It is reported on design experience in locating over 100 cameras on freeways and surface streets in California, with suggested guidelines for camera site selection. The preliminary and final camera site selection process is discussed. The innovative design and operation of the CCTV video van which is used in the video survey is also discussed as an alternative to bucket truck surveys.
CCTV camera site selection: a field experience
Versuchsergebnisse zur Auswahl der geeignetsten Stellen für die Plazierung von Verkehrsüberwachungskameras
1995
7 Seiten, 1 Bild, 4 Quellen
Conference paper
English
CCTV Camera Site Selection - A Field Experience
British Library Conference Proceedings | 1995
|CCTV Camera Site Selection: A Field Experience
British Library Conference Proceedings | 1995
|CCTV camera site selection:a field experience
Automotive engineering | 1995
|