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New York City's Domain Awareness System has 6,000 video surveillance cameras linked together, there are over 4,000 cameras on the subway system although nearly half of them do not work, and two thirds of large apartment and commercial buildings use video surveillance cameras. In the Washington D. C. area, there are more than 30,000 surveillance cameras in schools, and the Metro has nearly 6,000 cameras in use across the system. The Cheshire figure is regarded as more dependable than a previous study by Michael McCahill and Clive Norris of UrbanEye published in 2002. Based on a small sample in Putney High Street, McCahill and Norris extrapolated the number of surveillance cameras in Greater London to be around 500,000 and the total number of cameras in the UK to be around 4,200,000.burglar alarms systems
Online orders only. Other restrictions may apply. Cox Silver Bundle with Homelife Discount months 13 24 Note: Most promotional prices cannot be combined with promotional prices for other services. The regular rate for this service may apply if another promotional service is added to your cart. Offer expires 09/30/2019 and is available to new residential customers in Cox service areas. Offer is only available for new subscriptions to Cox Contour TV and Internet Ultimate service.