You could stop them making it, if you wanted.
Stick to the speed limit.
Sorted.
I'm more keen to try and save lives and injuries than limiting any kind of damage to my wallet though...
You could stop them making it, if you wanted.
Stick to the speed limit.
Sorted.
We're going to have to disagree then, something I very rarely do with your comments.
You are mixing up petrol and diesel emissions for 1, but also not allowing for the volume of emissions. Fairly easily demonstrated by running a petrol car and then a diesel car in a small workshop with ventilation and extraction closed off. Within minutes (2 or r 3) the diesel exhaust fumes are noticeable and then progressing to choking. Increased revs worsens it quickly, very quickly.
Whilst with (modern) petrol engine doing the same it is not as noticeable for maybe 10 minutes, but again increased revs worsens it.
Not something I'd recommend you do, but have experienced above and can tell you if 1 diesel car can do that , I actually worry what the volume of traffic in built up areas is really doing, to all of us, but some must really suffer.
A quick look at many diesels that emit a cloud of black smoke as they accelerate is a visual proof of the emissions volume increasing
Interesting, the big dip around 2020?That poor little engine! Wouldn't pull the skin off a rice pudding, and someone is deluded enough to think that it's "perfectly happy" at about 1200 revs in 4th... Now THAT'S the sort of crime that I think should be deserving of a custodial (in fact, possibly even capital)penalty...
In your self-righteous (but utterly impotent) rage, you are confusing "being held up" with "deserving to be held up". It goes without saying that I don't give the proverbial flying f*&^ whether you think folk "deserve" to be held up or not, it doesn't really change the fact that they ARE being held up...
At least you got that right...
I certainly hope never to grow any like yours, at any rate!
As I've said before, I am motivated to try and reduce deaths and serious injuries on our roads. You, on the other hand, appear to be motivated by a short-sighted desperation for "compliance", more than anything else. (Not that you have much to show for it again this year...)
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Agree and disagree with that but.We have to compare like with like though. Assuming they're both current "Euro 6d" cars, you shouldn't see ANY smoke out of a diesel on acceleration - absolutely none! If we're talking about older cars, before cats and DPFs, then diesels are better on CO and HC but worse on NOx and particulates.
If you're talking about the first 10 minutes after startup, petrol engines tend to run hotter, so from a cold start, you'll see a small improvement earlier from the petrol engine as its cat "lights up" sooner and starts working, but both of them have to do their emissions tests starting from the same "cold" start temperature, though, and they both have to drive the same WLTP drive cycle. Limits for both are identical apart from the NOx limit for diesels - which is very slightly higher. That is proposed to be addressed in the Euro 7 regs, but some pundits seem to think it will just kill-off diesels altogether because they'll need massive amounts of AdBlue to get the NOx down enough.
My gut feeling (and I wish the government would do some actual research on it), is that if all vehicles were correctly maintained Euro 6d (RDE) or later, we wouldn't really have that bad an air quality problem. That goes for petrol AND diesel. However, in practice, that means banning anything powered by an ICE, built before about the end of 2020, and given the backlash against ULEZ requirements as it is, that's just not going to happen. What we really DO need to come down hard on, (IMO) are post-registration modifications to engines ( de-cats, DPF and EGR deletes, Remaps, etc) that take them out of compliance. They're (again IMO) what's dragging us back. Our MOT emissions test just isn't "fit for purpose". It can't check emissions under load and it can only (in any meaningful sense) look for CO and HC at no load. Particulates testing with a smoke meter, is a joke, and they can't test for NOx at all!
Being "held up" means that someone's progress is being impeded, delayed. It presupposes that an unimpeded, undelayed progress would be possible were it not (in the context used by norseman & ReganAndCarter) for drivers adhering to the limit.In your self-righteous (but utterly impotent) rage, you are confusing "being held up" with "deserving to be held up". It goes without saying that I don't give the proverbial flying f*&^ whether you think folk "deserve" to be held up or not, it doesn't really change the fact that they ARE being held up...
(Not that you have much to show for it again this year...)
Interesting, the big dip around 2020?
Agree and disagree with that but.
You are not allowing for volume of emissions. More fuel in more emissions out, no matter how clean or dirty
Being "held up" means that someone's progress is being impeded, delayed. It presupposes that an unimpeded, undelayed progress would be possible were it not (in the context used by norseman & ReganAndCarter) for drivers adhering to the limit.
Being delayed is being made late, or slow. Slow can only exist in a frame of reference which must include what the speed limit is, as travelling at the speed limit can only be regarded as normal. Being made late? If a driver is made late because of speed limits the fault is entirely his, not the speed limit, and not other drivers who are adhering to it.
The only way faster progress would be possible would be via driving illegally.
The way you describe the situation of people driving according to the law is highly pejorative, and clearly shows that you do not respect the law.
You've been shown the evidence of the efficacy and desirability of 20mph speed limits many times. There's no point me showing any of it to you yet again because you are one of those people who, when presented with facts which contradict your existing beliefs, decides to ignore the facts rather than accept that his existing beliefs were mistaken
More tedious, semantic ****** to try and obfuscate your way out of the hole you're digging yourself.
None of that lengthy diatribe changes the fact that a slower driver in front, "holds up" a faster driver behind.
I guess I ought to be thankful for small mercies then! Yes, you (and others) have presented all sorts of cherry-picked "evidence" in your attempts to back up your claims that slower = safer. It must be a constant irritation to you that the number of deaths and serious injuries on our roads changes very little as a result of ever-increasing speed limit reductions and automated enforcement. Come back when that graph has a decent downward slope on it and we can continue the conversation, eh? I expect the new crop of driver assistance systems to have a far greater effect than anything the hysterical "speed kills" lobby has managed to achieve.
And that really was my pointWith both engines, if you keep the same load, then yes, I agree, higher RPM = more fuel in, and more CO2 out. I don't think the other pollutants are quite so linear though. NOx, for example, is formed when combustion chamber temperatures get high (i.e. at larger power outputs).
Nowhere have I said I agree with lower speed limits, but I can understand some of the arguments for them. The real issue is that too many people don't care about emissions, they want to keep taking dirty vehicles into built up areas. Too many would also try to travel at excessive speeds for the circumstances, so we all get saddled with the easiest, cheapest control, low speed limits.
Simply put. Progress versus riskSo which arguments for them do you not understand?
And what's a "low" speed limit? What context or reference point are you using to say that our speed limits are low? Earth's orbital velocity is 66,616 mph - is that your comparator?
No such thing as an ideal speed limit.That means nothing.
What is "progress"? How much "progress"? How is it measured? Is there an acceptable range? Who decides these things? How do they decide these things?
What is "risk"? How much "risk"? How is that measured? Is there an acceptable range? Who decides these things? How do they decide these things?
And was that an answer to both of my questions?
I can see how you might have thought it was worth trying to get away with it as an answer to "what's a low speed limit?", but as an answer to "which arguments for them do you not understand?" ?