Any - How does the Highways Agency obtain traffic info - RobertT
I've downloaded an App which offers me up to date traffic density information. There are so many roadworks where I live, as councils strive to spend their highways allocations, that I've found this app to be very good.

I just wondered, how do they obtain such accurate up to date info? Do they have satellites that monitor the flow by some means?
Any - How does the Highways Agency obtain traffic info - diddy1234

Probably uses the google maps info for live traffic updates.

These days almost everyone has a smart phone and in this country by and large it's android so I suspect that android phones report back their position (not sure how often) and this can determine if your sitting still in traffic or travelling along.

Now upscale that by a few million phones and now you have up to date traffic conditions on the roads

Any - How does the Highways Agency obtain traffic info - RT

Many roads have traffic sensors above or alongside them - they can monitor the volume and speed of the traffic and updates the Highways England or Traffic Scotland websites www.trafficengland.com/ trafficscotland.org/map/index.aspx?type=1,2,35

Any - How does the Highways Agency obtain traffic info - FP

I use TomTom MyDrive on my PC. As it maps congestion on even minor side-roads I assume it's using mobile phone data.

It's accurate provided you take into account that it always lags behind the current situation by several minutes at least, which is worth bearing in mind when checking what parts of your journey will be like by the time you actually get there.

In other words, you have to know the current trend - e.g. is it towards the end of the rush hour? Or is it early rush-hour and therefore likely to get worse? If your route passes a school, how close is it now to pick-up/drop-off times?

Any - How does the Highways Agency obtain traffic info - jc2

Little infra-red sensors fitted on bridges over traffic lanes.

 

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