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https://www.bbc.co.uk/news/uk-wales-48723302 for full story.

Air pollution: Trial M4 50mph limits made permanent

Temporary 50mph speed limits on two stretches of the M4 - introduced to cut air pollution through built-up areas - are to be made permanent.
The limit was reduced on the motorway and on stretches of A-road in December 2018 in an attempt to cut nitrogen dioxide emissions.
The High Court had ordered ministers to act after they failed to meet EU targets on air pollution.
The Welsh Government has now confirmed the restrictions will stay permanently.
The 50mph limits are at the M4 Port Talbot, M4 Newport, A470 Pontypridd, A483 Wrexham and A494 Deeside.
A Welsh Government spokesman said nitrogen dioxide levels were above legal limits and "must be reduced".
"It was established that a 50mph speed threshold alone was the measure that would achieve compliance in the shortest time possible," he said.
"The current speed limit in place will be retained through permanent traffic regulation orders and remain in force to maintain air quality standards."
 

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Judging by the absolute carnage the local extended 50 limit causes, this will be interesting.

Only car drivers observing it are learners, new drivers & pensioners, all in the outside lane.
Now they know why it is there...
Will they be more, or less likely to comply.

Locally we have been referring to that stretch as a cash generator.
The fact that they do not make any claims, nor produce any statistics for the reduction,
well, that just reinforces the belief about North Wales loving to prey on drivers,
rather than any real benefit to emissions.
 

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Discussion Starter #6
North Wales has ~ 200,000 vehicles travelling at peak time.

They have a combination totalling 10 officers/cameras/etc to every individual motorist.
They like SLK/C models in particular.
Every tour we have held there, they have joined us for long periods.
In fact, they liked Devilmans R170 so much, they got up early and waited for him outside the hotel.
Nobody had sped, blown a red etc.
They just figure Mercs can afford higher fines.
 

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Surely statistics and evidence that the reduction in the speed limit has reduced emissions must exist, and be in the public domain. If not then a freedom of information request should be made.


I may do a bit of digging to find which department is responsible and request the raw data.



I can not see how a lower speed limit helps emissions!


If you are travelling slower, then you are poluting (at a lower level) for a longer period of time!
 

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So you've got the same problem up North as we have down South then Myk >:D

The speed restrictions on the M4 at Port Talbot and Newport have been there for years, not since 2018, and I thought they were already permanent :surprise:

They were brought in as a 'safety issue', well before 'emissions' was the buzz word.

Oh yes, and they are also a cash cow :frown:
 
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