Lower motorway speed limits

Lower motorway speed limits

Author
Discussion

jdcampbell

1,231 posts

250 months

Monday 6th January 2014
quotequote all
saaby93 said:
What are the downsides to moving to France?
The French!

dcb

5,838 posts

266 months

Monday 6th January 2014
quotequote all
mrmr96 said:
(My bold) Huh? I appreciate you don't agree with being made to drive slower, as you want to get there faster. But I don't see how you could argue that driving at 60, rather than 70, would be anything other than safer AND more efficient?
Oh the innocence of the badly informed ;->

#1 killer on motorways is inattention. Inappropriate speed is about #7,
according to UK Dept of Transport.

So doing a speed where you minimise inattention matters far
far more than the raw speed you are doing. That might
be 30 mph in complex environments and 120 mph out on
the open German autobahn.

Not many Brits seem to appreciate this. Going faster can be safer, because
you are concentrating on your driving.

The Germans have appreciated this point for many years, which
is why they mainly focus on driver quality, not raw car speed.

Most traffic scientists recommend setting the speed limit
at about the 85th percentile. In the UK, that's about 83 mph,
since about 20% of all motorway traffic does over 80 mph,
according again to UK Dept of Transport.

Different cars have different efficiencies at different
speeds. Have a think about why fuel consumption numbers
in urban places are always much worse than out on the
open road.

otolith

56,201 posts

205 months

Monday 6th January 2014
quotequote all
dcb said:
Have a think about why fuel consumption numbers
in urban places are always much worse than out on the
open road.
Acceleration and deceleration vs constant speed.

anonymous-user

55 months

Monday 6th January 2014
quotequote all
otolith said:
dcb said:
Have a think about why fuel consumption numbers
in urban places are always much worse than out on the
open road.
Acceleration and deceleration vs constant speed.
Actually, assuming you're not driving like a tit, it's mostly due to engine friction per road wheel rotation, otherwise known as "low gears"!

otolith

56,201 posts

205 months

Monday 6th January 2014
quotequote all
Max_Torque said:
otolith said:
dcb said:
Have a think about why fuel consumption numbers
in urban places are always much worse than out on the
open road.
Acceleration and deceleration vs constant speed.
Actually, assuming you're not driving like a tit, it's mostly due to engine friction per road wheel rotation, otherwise known as "low gears"!
But a constant 30mph on the motorway in the highest gear it will tolerate would beat the urban figure, and increasing the peak speeds in the urban cycle would reduce it.

anonymous-user

55 months

Monday 6th January 2014
quotequote all
Should EV's be exempt from this new speed limit? if not, why not?

HannsG

3,045 posts

135 months

Monday 6th January 2014
quotequote all
Cut air pollution....

WTF

0000

13,812 posts

192 months

Monday 6th January 2014
quotequote all
Max_Torque said:
Should EV's be exempt from this new speed limit? if not, why not?
I'd get a kick out of that and probably an electric car if it looked to be rolled out further.

Unfortunately, I think the air pollution is just an excuse to have a go at drivers.

aka_kerrly

12,419 posts

211 months

Monday 6th January 2014
quotequote all
Max_Torque said:
Should EV's be exempt from this new speed limit? if not, why not?
Excellent point as well as your information about the NOX emitted by HGVs.

If those in charge just came out and said we are adjusting the speed limit to 60mph get over it , that would be better than this pissing around pretending every decision is based on the environment when it clearly isn't.


Pablo68

910 posts

136 months

Monday 6th January 2014
quotequote all
saaby93 said:
aw51 121565 said:
I doubt this particular situation (the proposed M1 scheme) would happen on autoroutes in France, for example, where the population is more spread out and the average population density countrywide is only around 25% that of the UK wink .
What are the downsides to moving to France?
Many. Having had the pleasure of two years living in Bretagne I can assure it isn't a Nirvana of motoring heaven.

Magog

2,652 posts

190 months

Monday 6th January 2014
quotequote all
aka_kerrly said:
Max_Torque said:
Should EV's be exempt from this new speed limit? if not, why not?
Excellent point as well as your information about the NOX emitted by HGVs.

If those in charge just came out and said we are adjusting the speed limit to 60mph get over it , that would be better than this pissing around pretending every decision is based on the environment when it clearly isn't.
I can't help but think the decision is probably much more about increasing capacity, without expending massive amounts on capital works. If the speed differentials between all vehicles are much smaller you're going to be able to force much more traffic through a given carriageway than if they range between 50-90mph.

David87

6,662 posts

213 months

Monday 6th January 2014
quotequote all
To cut pollution? In a way, I can't wait wait for alternatively-fuelled vehicles to become more mainstream just so the government won't have the option of rolling out the 'pollution' bks all the time.

graham2400

7 posts

199 months

Tuesday 7th January 2014
quotequote all
Electioneering perhaps ?

The 60 MPH proposal seems to be in response to some EU "guidelines" on air quality. Nothing to do with safety.

http://www.bbc.co.uk/news/uk-politics-25619914

Could it be that the real idea of the 'UK response' to the EU guidelines (the proposal and 'consultation' for the 60MPH limit) is to really wind UK voters up about EU rules and regs, which often seem to dictate UK policy, and which many voters hate, therefore influencing their future voting preference at the 2015 election.

When the results of the 'consultation' come in ("likely to be :- we don't want the EU imposed 60 limit"), the "proposal" will then most likely be rejected by our current government, who won't implement it and can then be seen to be standing firm and strong against EU dictats. This stance will help draw votes away from UKIP and help the Tory party in the marginals.

The likely truth is the EU were never that prescriptive on how the UK get its emissions down, and they never actually asked for the 60 limit anywhere on the M1.

As a PS, I don't agree with any speed limits based on vehicle emissions, where will the mission to reduce emissions end, no classic cars, no non essential journeys (how do you define those ?), no tourism etc. etc. ?

otolith

56,201 posts

205 months

Tuesday 7th January 2014
quotequote all
They aren't guidelines, they're binding rules which will result in a case against us in the European Court of Justice if we ignore them:

http://ec.europa.eu/environment/legal/law/press_en...

Blakewater

4,310 posts

158 months

Tuesday 7th January 2014
quotequote all
If you look at any motorway where the speed limit has been reduced you see all the traffic bunching up, everyone driving up the back end of the car in front and HGV drivers tailgating. Everyone is dabbing their brakes the whole time. Then you get the odd few drivers weaving between lanes because they think another lane is moving faster than the one they're in, they force everyone around them to brake and the whole thing grinds to a halt. Usually with a massive shunt and on a section of managed motorway there's nowhere for the crashed cars to go out of everyone else's way and no clear lane for the emergency services to use to get through.

The resulting slowing and accelerating of traffic being forced to travel more slowly followed by the inevitable traffic jam increases air pollution. I also find managed motorways and sections of road with average speed cameras incredibly stressful to drive on because, even though I know more or less how fast I'm going, I find myself having to focus too much on my speedometer and I'm hemmed in amongst traffic tailgating me from behind and running level either side. On a free flowing motorway where there is a greater speed differential between vehicles I can pass people quickly, I'm rarely tailgated and I'm free to easily change lanes if I am.

Owen Paterson has decided it's a great idea to chop down all our ancient woodland to build stuff on the land and he thinks planting a few sapling trees makes up for it, so the government doesn't give a stuff about the environment in practice and making money is a greater priority.

http://www.theguardian.com/environment/2014/jan/04...

cologne2792

2,128 posts

127 months

Tuesday 7th January 2014
quotequote all
I'm more worried about where this is going...
IF we drive slower and use less fuel then the Government loses tax revenue - so where is this money going to come from ?
With the loss of the tax disc and 'convenient' electronic charging, will the cost of ved increase for 'Environmental Reasons ' ?

XJ Flyer

5,526 posts

131 months

Tuesday 7th January 2014
quotequote all
Gixer said:
With an ever increasing number of our NSL roads becoming 50,40 or even 30mph, I wondered how long it would be before motorways were ruined as well

I see a future where motorways will be 50, other roads 30 and town roads 20....
It's obvious that's the real control freak agenda in order to create more dependence on rail by making road use ever more untenable for long journeys.

powerstroke

10,283 posts

161 months

Tuesday 7th January 2014
quotequote all
It's just depressing being a member of the EU
We either need a labour government to wreck
the economy so the population will shrink or
UKIP to get our laws back and control our Borders .
This speed limit ste is just one of many
Measures we will suffer if we continue to be so
Over populated ..



McClure

2,173 posts

147 months

Tuesday 7th January 2014
quotequote all
They've had a 50 limit on the southern portion of the M25 for a long time now. (Has anyone ever seen any work being carried out there? 50 limit by stealth...)

greygoose

8,269 posts

196 months

Tuesday 7th January 2014
quotequote all
Looks like the war on motorists continues, not so long ago they floated the idea of raising the speed limits to 80 and I thought it wouldn't happen and now they are going to reduce it! How long before this is extended across the country?