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| London Transport (uk.transport.london) Discussion of all forms of transport in London. |
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#7
August 16th 03, 06:48 AM
posted to uk.transport.london,uk.rec.cycling
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Camera like sensors on top of traffic lights
On Thu, 14 Aug 2003 23:30:12 +0100, Robert Woolley
wrote: They are detectors which use microwaves to 'see traffic' and adjust accordingly. Microwaves get reflected by moving metal objects. They don't work well if traffic is generally very slow moving. So why does anyone think they are useful in London? -- Peter Lawrence |
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