Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




5268 posts

Uber Geek
+1 received by user: 1143

Trusted
Subscriber

Topic # 198543 13-Jul-2016 10:53
One person supports this post
Send private message

As people around me on the southern motorway in Auckland were whizzing along at 110kph to 120kph (and beyond) yesterday I began to wonder what difference those speeds made on CO2 (and other) emissions.

 

I was thinking this because in talking to people I do find many are concerned by about climate change and many of those bemoan the government's relatively passive approach and official "adaptation" (ie: do nothing, really) policy. 

 

Assuming one takes the issue seriously (the evidence is now very clear that we should) the next thought is something like: "Well....what can I do now right now that will make any difference?" 

One of the answers is simply: slow down. 

When driving at 115kph in a 1.4L-2.0L petrol-powered car you're producing over 50% *more* CO2 than if you just drive at 100kph. Those are defacto "illegal" and unnecessary emissions as those speeds are illegal anyway. At 130kph over the limit you're off the chart and more than double the emissions at 100kph.

So....here is a simple, practical thing each of us who drive petrol cars (I still own one, too) can do, right now - today - to reduce our CO2 emissions.

Even you don't care about emissions, you can save 12% to 18% of your motorway (at least) fuel costs by driving at 100kph instead of 120kph. 

 

(source) Note that the EU cars often have higher emissions standards than apply in NZ

 

 

 

  

 

 





____________________________________________________
I'm on a high fibre diet. 

 

High fibre diet


View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
1586 posts

Uber Geek
+1 received by user: 156

Trusted

  Reply # 1590863 13-Jul-2016 10:58
3 people support this post
Send private message

you can save 12% to 18% of your motorway (at least) fuel costs by driving at 100kph instead of 120kph. 

 

 

 

But if you're going 20% faster for only 12% more fuel....





CPU: Intel 3770k| RAM: F3-2400C10D-16GTX G.Skill Trident X |MB:  Gigabyte Z77X-UD5H-WB | GFX: GV-N660OC-2GD gv-n660oc-2gd GeForce GTX 660 | Monitor: Qnix 27" 2560x1440

 

 


1243 posts

Uber Geek
+1 received by user: 530


  Reply # 1590868 13-Jul-2016 11:01
2 people support this post
Send private message

@linuxluver. Good post. But how is it even possible to drive over 40km/h on an Auckland motorway? wink


 
 
 
 




5268 posts

Uber Geek
+1 received by user: 1143

Trusted
Subscriber

  Reply # 1590874 13-Jul-2016 11:16
Send private message

andrew027:

 

@linuxluver. Good post. But how is it even possible to drive over 40km/h on an Auckland motorway? wink

 

 

:-) I hear you. 

 

Off-peak and / or against the flow (out of town when everyone is headed in, for example)  it's possible to go pretty fast.....I'm told.  :-)

 

 

 

 





____________________________________________________
I'm on a high fibre diet. 

 

High fibre diet


4474 posts

Uber Geek
+1 received by user: 849

Trusted
Lifetime subscriber

  Reply # 1590879 13-Jul-2016 11:19
Send private message

I always tend to live my diesel running for 1 hour or 2 while waiting at the parking lot. I always wonder how much emission I contribute unnecessarily. Do you know if diesel or petrol produce more CO2?







5268 posts

Uber Geek
+1 received by user: 1143

Trusted
Subscriber

  Reply # 1590881 13-Jul-2016 11:20
One person supports this post
Send private message

mentalinc:

 

you can save 12% to 18% of your motorway (at least) fuel costs by driving at 100kph instead of 120kph. 

 

 

 

But if you're going 20% faster for only 12% more fuel....

 

 

What a deal, eh! :-) 

 

Yeah...that's where the concern about climate change kicks in and you take ownership of your small piece of the problem. 





____________________________________________________
I'm on a high fibre diet. 

 

High fibre diet




5268 posts

Uber Geek
+1 received by user: 1143

Trusted
Subscriber

  Reply # 1590885 13-Jul-2016 11:25
Send private message

nakedmolerat: I always tend to live my diesel running for 1 hour or 2 while waiting at the parking lot. I always wonder how much emission I contribute unnecessarily. Do you know if diesel or petrol produce more CO2?

 

They are about the same for CO2. But deisel also produces a host of very active carcinogens that are now seeing it phased out of light vehicle fleets. It's just too hard to meet emissions standards when  alternatives like electric cars are now on the cusp of being practical, thanks to huge advances in cheaper batteries.

 

In 2 years we'll see a wide range of EV cars with 60kw to 80kw battery packs with zero emissions that can do 300km-500km per charge. So that's basically one or two 15-20 minute charges between Wellington and Auckland....in an utterly clean vehicle with (generally) far more power than a diesel or petrol car of the same class.  

 

The 80kw motor in a Nissan LEAF should be very interesting to any would-be boy racer.....and that's an early-days EV with a 200+km range (2016 models with 30kw battery packs) you can buy right now via imports for about $40K.  





____________________________________________________
I'm on a high fibre diet. 

 

High fibre diet


BTR

1493 posts

Uber Geek
+1 received by user: 449


  Reply # 1590886 13-Jul-2016 11:27
2 people support this post
Send private message

If all of NZ drove at the correct speed and turns lights off when we weren't using them and even turned off the LED lights on network switches it wouldn't make a dent on the worlds C02 emissions. 

 

 

 

The planet will recover itself even after humans have wiped themselves out. Nature has an impressive way of adapting and repairing itself.




5268 posts

Uber Geek
+1 received by user: 1143

Trusted
Subscriber

  Reply # 1590893 13-Jul-2016 11:29
6 people support this post
Send private message

BTR:

 

If all of NZ drove at the correct speed and turns lights off when we weren't using them and even turned off the LED lights on network switches it wouldn't make a dent on the worlds C02 emissions. 

 

 

 

The planet will recover itself even after humans have wiped themselves out. Nature has an impressive way of adapting and repairing itself.

 

 

Your logic is true of any single group of 4.5 million people. They could al use that excuse...and thus 7 billion people do nothing. 

 

It's corrupt thinking. It's negligent. It's irresponsible (in the meaning of failing to be responsible). 

 

It's how this government thinks...and a HUGE part of the reason why we need a new one with a functioning conscience. This one isn't it. 





____________________________________________________
I'm on a high fibre diet. 

 

High fibre diet


135 posts

Master Geek
+1 received by user: 22

Subscriber

  Reply # 1590897 13-Jul-2016 11:33
One person supports this post
Send private message

Is the additional CO emissions per km travelled, or per hour driving? I assume it's per km travelled. If it's per hour of driving, then you have to factor in the reduced amount of time spent on the road as you reach your destination faster.

4718 posts

Uber Geek
+1 received by user: 2201

Trusted
Subscriber

  Reply # 1590900 13-Jul-2016 11:34
2 people support this post
Send private message

BTR:

 

 

 

The planet will recover itself even after humans have wiped themselves out. 

 

 

 

 

Probably. But wouldn't it be better if we let it recover before we wiped ourselves out?





iPad Air + iPhone SE + 2degrees 4tw!

These comments are my own and do not represent the opinions of 2degrees.




5268 posts

Uber Geek
+1 received by user: 1143

Trusted
Subscriber

  Reply # 1590930 13-Jul-2016 12:30
Send private message

rendezvous: Is the additional CO emissions per km travelled, or per hour driving? I assume it's per km travelled. If it's per hour of driving, then you have to factor in the reduced amount of time spent on the road as you reach your destination faster.

 

Saving 10% of time doesn't justify 50% more emissions to any rational person. 

 

Anyway.....this post was intended to inform people who share a concern about CO2 emissions. I understand some people aren't yet ready to be concerned about this. 





____________________________________________________
I'm on a high fibre diet. 

 

High fibre diet


1243 posts

Uber Geek
+1 received by user: 530


  Reply # 1590946 13-Jul-2016 13:02
Send private message

SaltyNZ:

 

BTR: The planet will recover itself even after humans have wiped themselves out.
 

 

Probably. But wouldn't it be better if we let it recover before we wiped ourselves out? 

 

My thoughts exactly. I would prefer not to have to wait for that condition to be met.


469 posts

Ultimate Geek
+1 received by user: 107


  Reply # 1590967 13-Jul-2016 13:34
One person supports this post
Send private message

I think it's pretty obvious that the faster you go the more fuel you use, but...

 

linuxluver: Even you don't care about emissions, you can save 12% to 18% of your motorway (at least) fuel costs by driving at 100kph instead of 120kph.
Not quite - its the savings gained by using a model that 'assum[es] that all drivers fully respect the speed limit [110km/h] and that the vehicles are very smoothly driven at the speed limit. This is an artificial condition but may demonstrate the maximum potential results of introducing a new speed limit.' That model is quite different from the reference ARTEMIS 130: 'a typical driving cycle assuming a speed limit of 120 km/h, which is not fully respected, meaning that some speeding occurs.'

 

A more accurate comparison would be the 2-3% reduction of ARTEMIS 120 [similar model parameters to ARTEMIS 130 but with a speed limit reduction from 120km/h to 110km/h].

 

linuxluver: When driving at 115kph in a 1.4L-2.0L petrol-powered car you're producing over 50% *more* CO2 than if you just drive at 100kph. Those are defacto "illegal" and unnecessary emissions as those speeds are illegal anyway. At 130kph over the limit you're off the chart and more than double the emissions at 100kph.
The document refers to 'mean speed', which suggests (but is not clear because they don't explain a different methodology) they are using models with a maximum speed and speed limit above the mean - ARTEMIS 130 has an average speed of 100km/h and a top speed of 132 km/h, while ARTEMIS 120 has an average speed of 90km/h and a top speed of 122km/h.

 

 

 

* The models are an 'average' 18 minute trip. Despite the different average speeds, each model takes the same amount of time, so I'm not sure whether that means the higher speed model travelled further...?


135 posts

Master Geek
+1 received by user: 22

Subscriber

  Reply # 1590987 13-Jul-2016 14:05
2 people support this post
Send private message

Linuxluver:

rendezvous: Is the additional CO emissions per km travelled, or per hour driving? I assume it's per km travelled. If it's per hour of driving, then you have to factor in the reduced amount of time spent on the road as you reach your destination faster.


Saving 10% of time doesn't justify 50% more emissions to any rational person. 


Anyway.....this post was intended to inform people who share a concern about CO2 emissions. I understand some people aren't yet ready to be concerned about this. 



Yes, you're right.

It does concern me, I was just making sense of the data out loud.



5268 posts

Uber Geek
+1 received by user: 1143

Trusted
Subscriber

  Reply # 1591048 13-Jul-2016 15:37
Send private message

rendezvous:
Linuxluver:

 

rendezvous: Is the additional CO emissions per km travelled, or per hour driving? I assume it's per km travelled. If it's per hour of driving, then you have to factor in the reduced amount of time spent on the road as you reach your destination faster.

 

 

 

Saving 10% of time doesn't justify 50% more emissions to any rational person. 

 

 

 

Anyway.....this post was intended to inform people who share a concern about CO2 emissions. I understand some people aren't yet ready to be concerned about this. 

 



Yes, you're right.

It does concern me, I was just making sense of the data out loud.

 

I can be too earnest.....so sorry if I sounded "judgy". It's a character flaw I try to keep under control. :-)  





____________________________________________________
I'm on a high fibre diet. 

 

High fibre diet


 1 | 2
View this topic in a long page with up to 500 replies per page Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Geekzone Live »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.