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From: Jeff Layman <Jeff@invalid.invalid>
Newsgroups: sci.electronics.design
Subject: Re: Speed limiters
Date: Sun, 7 Jul 2024 10:03:25 +0100
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On 06/07/2024 22:53, Don Y wrote:
> On 7/6/2024 5:23 AM, Martin Brown wrote:

> There has been talk of using cameras and license plate trackers to infer
> the speed vehicles have traveled "across town" (i.e., at XX:XX:XX you
> were seen at intersection X and are now at intersection Y at YY:YY:YY;
> you could only have made that trip in that time interval if you exceeded
> the average speed of...")

That has been very common here in the UK for several years, particularly 
when there is a lot of construction and repair work for several miles on 
motorways. There are "averaging" speed cameras at the start and end of 
the roadworks, and at intervals too along the way (and always at 
sliproads for those entering and leaving the motorway within the 
roadworks). The first notice you get if you've been speeding is a letter 
of intending prosecution which suddenly arrives several days after 
you've driven along that stretch of road!

-- 
Jeff