70mph Motorway speed limits

[Matty]

Oh and when asked by anither AM if there was any evidence the measures had reduced NOx ahe said the evidence was "mixed" and nothing more. No details at all.

Hardly the way to get people onside. (Btw, what's an AM ).

Aston Martin. They're sentient now.

[nuttinnew]

So that's what they meant by Soul

[unzippy]

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

Won’t be the last, I imagine.

But this also applies to Tesla and other EVs?

[Swervin_Mervin]

Oh and when asked by anither AM if there was any evidence the measures had reduced NOx ahe said the evidence was "mixed" and nothing more. No details at all.

Hardly the way to get people onside. (Btw, what's an AM ).

Assembly Minister

And yes, it's total arse

[Swervin_Mervin]

Are these just sections that happen to have air monitors and the positioning is fairly arbitrary?

Not sure tbh. It wouldn't surprise me but the AQ monitoring location will probably originally have been decided on the basis of where you'd logically think it might be bad.

In the case of Wrexham that's going to obvs be on the stretch past Plas Coch as the entire area is fuckarood and has been for years. If you've got traffic queuing back down your slip roads on to the mainline carriageway it shouldn't be a surprise that your AQ will be bolloxed. Speed related emissions my 4rse

[V8Granite]

Wasn’t it Japan who turned a road into a river and now run the cars through a tunnel. It then improved air quality massively with a few years?

I have a vague memory of hundreds of children planting trees next to it etc.

Surely planting millions and millions of trees around be a good way to remove noise and co2?

Dave!

[Richard]

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

Won’t be the last, I imagine.

But this also applies to Tesla and other EVs?

Is it more to do with the flow of traffic being better when it’s 50 rather than 70, in congested areas? That’s what “smart” motorways do. It never feels like it’s working, but I guess there’s evidence to back up the idea

[Mito Man]

It works off the theory that everyone who drives at 70 leaves a 2 second gap so you can fit more cars in if you do 50. In reality everyone sits a few metres off each other so reducing the speed means the same flow with just a lower speed.

[Richard]

Or do they count how many cars drive past marker every minute or whatever at 70, then change the speed to 50 and measure again for a bit?

[Jobbo]

I hope everyone here follows the Bernoulli principle: speed up when the road narrows because you can only fit the same volume flow rate of cars through if you do that:

[Richard]

I hope everyone here follows the Bernoulli principle: speed up when the road narrows because you can only fit the same volume flow rate of cars through if you do that:

Can’t argue with that