What is life like with your car? Let us know and win £500 in John Lewis vouchers | No thanks
Proposed 20mph urban speed limit - Singer-G
I heard a report on radio 4 this morning of a proposal to reduce the current 30mph urban speed limit to 20mph. I think there is a case for 20mph on busy shopping high streets and urban housing estate roads. However a reduction to 20mph at all times on urban through routes is taking it too far. What do others think?

Edited by Dynamic Dave on 16/10/2007 at 18:16

Proposed 20mph urban speed limit - J Bonington Jagworth
We have a couple in windy* villages here. The irony is that the windy bits are self-limiting, so you couldn't do much more there anyway, but for the extended parts either side, it seems absurdly slow. More nanny state, I fear.

*as is winding, not windmill!

Edited by J Bonington Jagworth on 16/10/2007 at 12:10

Proposed 20mph urban speed limit - movilogo
Probably their speed cameras are not generating enough revenues as people are not exceeding 30 mph.

Now we'll see the ad if you hit me at 20 mph, there's 95% chance I'd survive and so on....

Proposed 20mph urban speed limit - Ruperts Trooper
A good money spinner - not all cruise controls can be set that low.
Proposed 20mph urban speed limit - teabelly
20 mph zones have a higher death/serious injury rate than 30 mph zones. What a totally moronic idea to increase the injury rate across towns and cities. Have they worked out how much longer and how much more pollution will occur in towns and cities as everyone is crawling along at 20mph? How about buses and their increased journey times? HGVs, deliveries. Why are these cretins allowed to come up with such stupid ideas? Most people slow down for housing estate roads (although I failed my first driving test because I did just that). Would it not be better to make sure the roads could support 30 mph traffic safely and cater for pedestrians with proper crossings so they don't have to fling themselves into the road to be run over? Where the roads are not suitable is not beyond the wit of man to educate the driving public to slow down anyway rather than slavishly obeying whatever limit is in force or have we dumbed down drivers so far all they can do is match the number on the lollipop to the one on the big dially thing in their car?
teabelly
Proposed 20mph urban speed limit - Mapmaker
I think it is a superb idea. It would be even better if it were extended to all areas that are currently 40mph. You can't be too safe.

All rural, currently deristricted, roads should be reduced to 40mph.

Finally, there is no excuse for cars doing 70mph on motorways. Traffic flow rates are greater at lower speeds, in fact traffic flow rates are maximised at about 10mph (I learned when doing a GCSE project for Geography). Fuel consumption is reduced at lower speeds, too. Therefore in order to maximise the flow of traffic down our congested motorways and to reduce fuel use, I suggest a 40mph speed limit.

All cars are to have retro-fitted satnav systems (Government supplied the cost would be minimal for such a huge order) so they can be monitored at all times for speeding.

This will improve the driving experience for all but a few, testosterone-fuelled, idiot drivers.
Proposed 20mph urban speed limit - Hamsafar
Slower speeds = more congestion = green light to local authorities to rob the victims caught up in it.
Proposed 20mph urban speed limit - Mapmaker
>>Slower speeds = more congestion

Not true. More congestion = slower speeds; the corollary is that slower speeds = LESS congestion.
Proposed 20mph urban speed limit - Robin Reliant
Perhaps we could all give up and walk everywhere. Not only would no-one ever die again but the economy would return to it's thriving state of 1890 before we wasted all this money on subsidising motoring.
--
Proposed 20mph urban speed limit - Glaikit Wee Scunner {P}
And in Scotland drivers will have their driving licences removed for kerb crawling at 20mph.
Sounds like a lose lose situation up there.
Proposed 20mph urban speed limit - movilogo
Isn't it a chicken-egg situation?

Cases where a motorway ends in a roundabout, there are usually long queues at the front of roundabout. Congestion arises because speed becomes low (near zero) at roundabouts.

So, slower speed = more congestion becomes true.

Take railway lines, if trains run at normal speed (which is fast), there are no delays!

If one train runs slowly, the whole system will come to an halt.

Anyway, I'm probably going off topic.

Proposed 20mph urban speed limit - Chris M
Portsmouth is rolling out 20mph zones big time. For anyone unfortunate enough to know the place, much of its' housing was built at the beginning of the last century. Long, straight narrow streets with cars tightly parked on both sides. To my mind, 20mph limits down these roads makes good sense.

We've tried the education route and it hasn't worked. We've tried speed humps and very few people have a good word for them.
Proposed 20mph urban speed limit - NARU
We've tried the education route and it hasn't worked.


I don't think we have tried the education route.

I have to have annual top-up training for my job (in which I can't kill anyone), but not in my driving (in which I can). I think all drivers should have a small amount of top-up training every 3 years or so. Not necessarily on the road (though that would be good, to pick up bad habits).

When a fatal accident happens, the police do an investigation. But there is no effective way of feeding the lessons learned back to the driving community.
Proposed 20mph urban speed limit - Mapmaker
>>Isn't it a chicken-egg situation? Cases where a motorway ends in a roundabout, there
>>are usually long queues at the front of roundabout

The distinction is between volume-induced congestion - to which I was referring - and bottleneck-induced congestion - to which you refer. Quite different.
Proposed 20mph urban speed limit - bignick2
Mapmaker said " The distinction is between volume-induced congestion - to which I was referring - and bottleneck-induced congestion - to which you refer. "

Without a bottleneck there can be no congestion - if nothing acts to disturb the flow of traffic then throughput and attainable volume is effectively infinite.

If one could take the M25 on its one fully open day per decade - close all entrances and exits - fill it completely with cars and set them off they could circle endlessly at very high speeds. Sadly this is the traffic model that road planners appear to use when designing new roads.


Proposed 20mph urban speed limit - audi dave
20 mph zones have a higher death/serious injury rate than 30 mph zones.


Teabelly, where's your evidence for this ? Seems to me logical that the likelihood of an accident would go down and the consequences of accidents would be less.

I reckon 20mph zones have their place - but making everywhere that's currently 30mph a 20mph zone wouldn't be sensible. I don't think that's what's proposed though.



Proposed 20mph urban speed limit - Chris White
I do think that some 30mph limits should be made 20mph, but as one poster pointed out above, these are usually the roads where you can only (or should only) do 20mph anyway.

It's a shame that the government thinks that we can't think for ourselves and adjust our speed accordingly (but then seeing some people's driving day to day, some people need as much hand holding and being told what to do and how to do it as possible...)

Chris
Proposed 20mph urban speed limit - teabelly
The evidence is in the DFT's own figures somewhere. The reasons for it could be: more attention spent on compliance with limit and less on surroundings hence impact speed higher as they are more distracted; less attention by pedestrians as they feel 'safer' as they think 20 mph won't hurt; greater probability of lower impact speed but greater likelihood of pedestrian being dragged under vehicle and crushed rather them bouncing off out of the way; exposure to danger - if traffic is travelling longer on a given stretch then if the probability of an accident is partially time dependent then you increase the chances of a pedestrian crossing when there is a vehicle around.

The above are possible reasons and should be investigated before a blanket roll out. Obviously two reasons are contradictory but should be looked into to find out if either is the case.
teabelly
Proposed 20mph urban speed limit - Baskerville
The evidence is in the DFT's own figures somewhere. The reasons for it could be:
more attention spent on compliance with limit and less on surroundings


Persons incapable of reading a speedometer and not crashing while driving at 20mph should certainly not be allowed to use vehicles capable of more than 20mph as their cognitive capacity is clearly impaired. Anyone who thinks avoiding a speeding ticket is more important than not crashing and therefore prioritizes watching the speedo rather than the landscape is a very special kind of idiot.
Proposed 20mph urban speed limit - Lud
a very special
kind of idiot.


They are being bred in large numbers by current speed limit enforcement policies.
Proposed 20mph urban speed limit - Vin {P}
teabelly: " The evidence is in the DFT's own figures somewhere."

I'd be interested to see where. The raw data here might well be interesting.

V
Proposed 20mph urban speed limit - teabelly
DFT data is here:

www.dft.gov.uk/172974/173025/221412/221549/227755/...s

The calculations I have seen ( I haven't checked them myself) show that 13% of injury crashes in 30 mph areas were fatal/serious but 17% of injury crashes in 20mph zones were fatal/serious. I don't know what the ksi per mile travelled figure is or how it equates to hospitalisations as hospital figures have shown an *increase* in road related injuries over the years not a decrease which the govt (stats 19) data shows.

There is something seriously suspect about govt statistics which show falling injury levels when hospitalisations and numbers of injuries shown in another data source are shown to be rising. With safer than ever vehicles it is really quite worrying. It also explains why the UK is now near the bottom of the EU safety league for most improved countries. In order to meet that target there needs to be a real reduction of 7%+ pa in ksi. Unfortunately even the massaged figures aren't showing that level of performance.
teabelly
Proposed 20mph urban speed limit - daveyjp
"The calculations I have seen ( I haven't checked them myself) show that 13% of injury crashes in 30 mph areas were fatal/serious but 17% of injury crashes in 20mph zones were fatal/serious"

Unfortunately figures showing accidents within zones means nothing if the actual speed of vehicles in 20 zones is far in excess of 20 mph - which from my experience of driving in 20 zones is usually the case.
Proposed 20mph urban speed limit - Singer-G
making everywhere that's currently 30mph a
20mph zone wouldn't be sensible. I don't think that's what's proposed though.


Having looked further into this I think you are correct. That's not what is proposed. However, that's how I perceived it from the radio report. Bad reporting, or just me not paying proper attention? I'm not sure which.
Proposed 20mph urban speed limit - Vin {P}
teabelly: "20 mph zones have a higher death/serious injury rate than 30 mph zones"

From a purely statistical view (not a view on the rights or wrongs of the overall question) that may well be true. It may be because roads with a 20mph are inherently likely to be dangerous roads in order to have been designated as 20mph limits in the first place. I also, on the same purely statistical basis, wonder what "rate" means in this context. Deaths per hour, per mile of road, per mile driven on these roads, per..etc, etc.

V
Proposed 20mph urban speed limit - henry k
However a reduction to 20mph at all times on urban through routes is taking it too far.
What do others think?

>>
I do not think there is any option.
20mph zones are being implemented in many many areas.

This includes, as I have mentioned before, main roads, like the A308 (Thames Street) which is a significant feeder to the M3.

In Surbiton a 20mph zone has recently been extended. I have no idea why. It starts several hundred yards from the only school.

Just get used to chair bound "experts" keeping sign makers on overtime.
Proposed 20mph urban speed limit - movilogo
more attention spent on compliance with limit and less on surroundings hence impact speed higher as they are more distracted; less attention by pedestrians as they feel 'safer' as they think 20 mph won't hurt;


My personal observation is that at present 20 mph zones has following features!

- cars are carelessly parked (can't say illegally).
- people appear from nowhere (as they feel safer, fully agreed with above post)
- there are speed humps (can't drive over 20 mph anyway)
- most of these roads are narrow, and with cars parked idiotically, chances of getting a scrape in office hours is very high.

While commuting to work, I had to pass 3/4 such roads if adopt shortest route.

However, because of the above irritations, I go via 30-40 mph routes in spite of lengthier routes.

PS: There is one road in Luton, where there is a speed camera in 20 mph zone! It's placed at the junction where 20 mph becomes 30 mph. Anyone who doesn't know this will speed up and will get caught!

Edited by movilogo on 16/10/2007 at 14:49

Proposed 20mph urban speed limit - tunacat
I have heard said, though not written explicitly, that the target of this is to *halve* the number of road deaths by 2010. I can't see that being realistic.

There are a couple of (non-school-frontage) 20 limit roads near my home. Thankfully they don't have cameras on them: Have any of you actually tried to utterly obey a 20 mph limit? It's not easy. Requires quite a bit of concentration, and I'm dubious as to how accurate a speedometer is when operating so low on its scale.

As with those signs you get on industrial estates which post a limit of 15, or 10, or even 5 mph, my experience on these local 20 mph roads is that yes, people do slow down and take more care - a bit - but virtually no-one gets right down to 20 or below.

On a 250 yard stretch outside a school, fine: put a 20mph camera on the start of the stretch and the end of it, to force people down to 20 or get nicked. But I also heard they're wanting to use average-speed cameras to police this idea if rolled-out to all existing built-up 30 zones. I can see that being a red-rag to the local teenager-with-a-drainpipe-exhaust brigade, who even now like nothing more than to noisily floor it then B R A K E in between all the existing speed humps, thus maximising the nuisance to the residents of the roadside houses.

Oooh, that just reminds me (slightly off this topic) - on just one journey through a nearby town centre this last Saturday I saw 3 or was it 4 cars of the chavved-up Impreza/BMW/Lexus IS200 brigade driving with no numberplate on the front bumper, but instead stuffed at a jaunty angle atop the dash at the base of the windscreen (and thus unreadable on approach). Bit of a coincidence. Is this some new dodge? "Ah yes officer, jus fell off 5 minute ago when I ad a likkle parkin shunt, innit."

Proposed 20mph urban speed limit - Westpig
On a 250 yard stretch outside a school fine: put a 20mph camera on the
start of the stretch and the end of it to force people down to 20
or get nicked. But I also heard they're wanting to use average-speed cameras to police
this idea if rolled-out to all existing built-up 30 zones.


wouldn't mind 20mph outside a school, when ther kids are about.......but do mind...greatly.. when it's the school holidays or in the middle of the night

guess when the enforcement would be a lot of the time? nice sunny Sat morning?
Proposed 20mph urban speed limit - Sofa Spud
The use of 20mph zones in carefully chosen areas would make sense - like town and city centres where there are lots of pedestrians, or outside schools during arrival and finish times, or in residential cul-de sacs, crescents etc. within which nobody can travel very far anyway.

However 30 mph seems about right as the general limit for built-up areas - if only more people would obey them!
Proposed 20mph urban speed limit - Sofa Spud
I've never bought into this 'gradual erosion of civil liberties' gripe in relation to driving on the roads. The freedom to travel might be civil liberty but driving a motor vehicle on a highway is not, and never has been. It's something we are permitted to do by licence only if we satisfy the authorities through passing a driving test that we are capable of driving safely.


Proposed 20mph urban speed limit - Pica
In Berkshire where my daughter goes to school there is a 40mph limit right outside it. But when the school is opening and closing there are such queues around it the average speed is about 1mph!

Bring back the man with the red flag walking in front of a car
Proposed 20mph urban speed limit - daveyjp
"Have any of you actually tried to utterly obey a 20 mph limit? It's not easy. "

No more difficult than observing, 30,40, 50 or 60. Choosing the correct gear is the key to it.
Proposed 20mph urban speed limit - David Horn
Too many people appear blissfully unaware that a car can also be a lethal weapon, no matter how skilled the driver. No matter how you look at it, a collision with a pedestrian at 20mph is orders of magnitude safer than 30mph.

In an urban area you will ALWAYS get people, particularly children, stepping into the road. Even if you have the awareness of a hawk, if a kid runs out between parked cars in a narrow street directly in front of you, you will hit them. I'd much rather be inconvenienced for a few minutes than have the death of a child on my shoulders, even if it wasn't my fault.

As to the enforcement... well, it's SPECS so it can't be argued that the cameras are positioned inappropriately, nor can it really be argued that it's safe to exceed the limit in built up areas. So I say throw the book at speeders in this scenario, and with any luck we might see a reduction in the number of GATSOs elsewhere.
Proposed 20mph urban speed limit - retgwte
what a lot of nonsense

bad science

and bad politics

we would be better off with a NZ style system where there are only 2 speed limits, 50 or 100 kph, and its easy to tell which one it is, and the emphasis is on the skill needed to drive appropriately to the conditions, instead of the mass of road furniture telling us how fast to go and how many cameras there are and other mostly counter productive guff which does not help you drive more safely

thinning roads down, and reducing the speed limits ever further is going too far, we already have dual carriageways which were for years 70 limits now showing 40 or 30 signs, as if mysteriously the have suddenly become unsafe at 70

come on most high miles driver have speed camera detectors of one kind or another, who we kidding with more rules and cameras?

now if they put some good old fashioned cops back on the roads who went after the folk genuinely driving dangerously, ie one inch braking distance etc, then we would be going in the right direction

if they actually gave people more points for pulling in front of a motorcycle and killing the rider than doing a few mph over the limit on an empty motorway

its clear the association of british drivers is closest to reality

if only we could wipe out the islington chattering classes dominating all out political parties people may actually vote, and some of this may get resolved

Proposed 20mph urban speed limit - Leif
It's what happens when you elect morons to government.

We have 20mph limits on all local residential roads including through roads. Quite often 20 mph is sensible, but quite often it isn't, and it is obvious to anyone when it isn't.

For example, side roads with cars parked on both sides, and room for one car to go down the middle should have a 20 mph limit IMO. But the main roads with two clear lanes and wide pavements should have 30 mph limits IMO. And anyone with any sense knows when to slow down.

Despite the 20 mph limits, there's an awful lot of loonies who ignore them completely and 40+ mph is common, as are dangerous high speed over taking manouevres.

Is the limit enforced? No. So what is the point? Pedestrians are lured into expecting cars going at 20 mph, sensible drivers are inconvenienced, and loonies can race around at excessive speeds with impunity.

No doubt the loonies will kill people, and the morons in government will say "Oooh, clearly 20 mph was too high, let's try 10 mph".

I also often see emergency vehicles going at high speed (40+ mph) down the main 20 mph road. Now I know that some of them are highly trained, and know when it is safe to speed, and when not. But I also know that some of them have very limited training.

Now if I had once seen the police using mobile radar guns on the local speeds I might have some sympathy with the current attitude to road 'safety'. I blame stupid politicians.
Proposed 20mph urban speed limit - tunacat
""Have any of you actually tried to utterly obey a 20 mph limit? It's not easy. ""

"No more difficult than observing, 30,40, 50 or 60. Choosing the correct gear is the key to it."

Daveyjp,
I reckon that's easy to say subjectively...

If I go down a narrow 30mph road with cars parked on both sides, I instinctively slow down, to what I feel is a safe speed. It might be less than 20 mph, it might be a tad more: I couldn't tell you: I'm concentrating hard on watching for kids etc...

Try making me have to ensure that I don't trigger any 20 mph camera arrangement along large swathes of road, and I'll be spending a lot of time looking at my speedo.
I'm not making excuses here - I just honestly think that's what will happen.

Proposed 20mph urban speed limit - martint123
This proposal comes from "Parliamentary Advisory Council for Transport Safety."
Ah, you say - but NO - it is NOT a Parliamentary Group. It is yet another "charitable" lobby group. "the thoughts of Gifford" at www.pacts.org.uk/beyond2010/PACTS-LTT443-Beyond201...f

TRRL sayeth "the killed and seriously injured (KSI)
figure is likely to be reduced by more than 40% by
2010 without any further new measures being
required."
Proposed 20mph urban speed limit - Westpig
two very good posts by 'retgwte' and 'leif' that echo my own thoughts
Proposed 20mph urban speed limit - autumnboy


Having recently returned from Canada and having driven in various City suburbs and Freeways.

Why is this country so Hell bent in having speed, traffic and town centre Camera's everywhere.

You find most areas make use of thier parks for the children to play and not in the streets. If our areas don't have such areas, then its the goverments fault in not having areas for our children to play safetly in.
Not the motorists

The next thing will Camera's for Bridleways and Cycleways to ensure you don't speed on your Cycle or Pony.

The traffic flows higher in speed and yet they have lower injury rates than we, maybe because the Pedestrian has the Right of Way in most cases, not the Motorist.


Proposed 20mph urban speed limit - Mapmaker
Latvian, Polish? all part of the EU, so fines coming soon to a place near here.


Middle Eastern plates are a much better idea. How many Mk i eyeballs can read Arabic, let alone ANPR. That said, I was admiring a Bentley with a traffic warden in Westminster the other week. He was able to tell me that it belonged to a member of the Saudi Royal Family (as he recognised the name on correspondence on the dashboard) and that he could read the plate better than he could read the UK plates.
Proposed 20mph urban speed limit - madf
Since the current 30mph limit is unenforced and widely flouted, it's all a load of spherical objects.
full stop. No further argument needed.
madf
Proposed 20mph urban speed limit - Westpig
interesting bit in today's motoring section of the DT(p.3) where Paul Smith of Safe Speed quotes fatal accident figures from the DoT that apparently show a 17% fatal or serious accidents in 20mph zones, but a noticeably lower 13% figure for 30mph zones

he goes on to say that shifting the balance from responsibility to regulation does not work

i have to say i agree with him

will anyone in authority listen?.........doubt it, too arrogant and they think they are right, despite evidence to the contrary