STREETSCAPE GUIDANCE

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HOME INTRODUCTION PART A A vision for London’s streets PART B From strategy to delivery PART C New measures for new challenges PART D Balancing priorities PART F Appendix PART E Physical design and materials SECTION 6 Introduction SECTION 7 High quality footways SECTION 8 Carriageways SECTION 9 Crossings SECTION 10 Kerbside activity SECTION 11 Footway amenities SECTION 12 Safety and functionality SECTION 13 Street environment SECTION 14 Transport interchanges Streetscape Guidance [Part E – Physical design and materials] Safety and functionality 268 A standard column height is eight metres, but poles also come in six, 10, 12 and 17 metre heights, however, safety cameras have their own requirements – please speak to our Traffic Infrastructure team for further information. Design criteria While some CCTV cameras may be attached to buildings or structures, many are located on high masts. CCTV cameras should be mounted on the most slender poles possible but must not be subject to camera shake. When placed on grass areas there must be adequate hard stand around the column and a hard access route across the grass area, this must also be provided for the cabinet and power supply. Roadside cameras require an electrical supply and a clear, unimpeded view of the highway. Safety cameras also require associated carriageway markings to support information recorded by the camera. Fixed safety camera housings must be coloured yellow either by fully painting the front and back of the housing, or fully covering both with retroreflective sheeting. The location of low level roadside cameras for speed, traffic signal or bus lane enforcement also needs to be conspicuous to avoid any claims of entrapment. Materials The function that the camera must perform often dictates the type of camera chosen • Shoebox camera – allows for high optical zoom therefore best used when monitoring from greater distances. Shoebox cameras are commonly used for enforcement duties and perform better in low light conditions. They tend to be more expensive than a dome camera • Dome camera – uses digital zoom therefore best used when monitoring areas of shorter distances. It is commonly used for monitoring traffic conditions and is less expensive than a shoebox camera • Automatic number plate recognition (ANPR) camera – used to capture detailed shots of licence plates and the vehicles that have committed traffic violations. Also used to measure average vehicle speeds over several points • Safety camera – used to capture traffic violations Dome camera Automatic number plate recognition (ANPR) camera Shoebox camera Safety camera
HOME INTRODUCTION PART A A vision for London’s streets PART B From strategy to delivery PART C New measures for new challenges PART D Balancing priorities PART F Appendix PART E Physical design and materials SECTION 6 Introduction SECTION 7 High quality footways SECTION 8 Carriageways SECTION 9 Crossings SECTION 10 Kerbside activity SECTION 11 Footway amenities SECTION 12 Safety and functionality SECTION 13 Street environment SECTION 14 Transport interchanges Streetscape Guidance [Part E – Physical design and materials] Safety and functionality 269 There are several types of column that can be used to mount a camera. The location, maintenance requirement and the speed and volume of traffic will influence the type of column used. Please contact our Traffic Infrastructure team for further information. Figure 266: Mounting options Fixed column • Cheaper installation costs but more expensive to access and maintain • Carriageway may need to be closed to access and service the camera • Can be combined with other street equipment more readily therefore reducing clutter Wind down trolley head • Eliminates the use of mechanical lifts for servicing thereby reducing maintenance costs • Area required to service the camera is reduced Mounted on buildings • Visual impact is reduced Fixed pole Wind down trolley head pole Combined with lights Mounted on buildings • Require the permission of the building owner to access • Require a maintenance agreement with the building owner • Installation and operation costs can be more expensive
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