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#1 Posted : 16 June 2006 02:01:00(UTC)
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Posted By Brett Day
There's been a few threads here lately related to driving, I post on another forum regarding road safety issues, other posters include those with an interest in road safety, those actively involved in road safety, and serving and ex traffic officers. I tried explaining the hierachy of controls (ERICPD) and they applied it to what they see and do in official policy, this is what they came up with:


"My initial reflection on this is that road safety is largely addressed using an entirely (or largely) INVERTED hierarchy to this!

Discipline - main thrust of road safety policy is on ENFORCEMENT and PUNISHMENT

PPE - not sure of the equivalent here unless it is a negative one - make people drive small underpowered vehicles etc??? (My comment, air bags, seat belts & crash helmets etc were later discussed as being a PPE item)

Control - it could be argued that much of current policy focus, with its emphasis on AUTOMATED TECHNOLOGY (not just cameras remember) is control oriented

Isolate - neglect of effective road engineering shows a lack of emphasis on this

Reduce - it could be argued that much current policy has actually INCREASED exposure rather than reduced it?

Eliminate - probably impossible, but reductions in traffic policing and the ineffectiveness of current policy at removing lunatic drivers, drunks, unregistered cars and uninsured drivers has failed to ELIMINATE these hazards.

So is current policy a*se over t*t in safety terms?"

Any thoughts, comments or critiques ?

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#2 Posted : 16 June 2006 08:19:00(UTC)
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Posted By Stupendous Man
Brett,

A nice summary and I would agree with your comments.

I think I would add the following comment:

It is my belief that road design, engineering and control measures have been developed over time without taking account of the change in peoples attitudes that is brought on by automotive development.

For example, I think that some people take more risks on the road due to the presence of safety cells, crumple zones, airbags, ABS and traction control in the more modern cars. Similarly, some people will feel the need to use inappropriate speed simply because their car has the power to do it.

Current control measures are more 'stick' than 'carrot' - but it would take a huge shift in the attitudes of both road planners and road users to change this approach.
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#3 Posted : 16 June 2006 08:57:00(UTC)
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Posted By Richard Davis
The explosion of car ownership numbers has not been shadowed by investment into the road network IMO. How much of the £180 or so for a years road tax is used to fund development and improvement of our roads?? Perhaps 10-15%?

By-passes are not popular when they cut unsightly grey swathes through the countryside, but atleast they do eliminate the risk of car meeting kids at school times.

I agree that we are lead into a false sense of security by the presence of air bags/curtains, safety cells and the like. I drove my old sports car into work today, which made a nice change..... but I am aware that any "dings" in it will result in a much higher risk of injury due to the relative lack of in-built protection in 1978.

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#4 Posted : 16 June 2006 09:22:00(UTC)
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Posted By Ian Mitchell
Hi,
I always felt as safe in my 1969 Ford Zodiac MKiV, but only because there was six feet of bonnet metal in front and people gave you a wide berth due to its size!

(Well, it is Friday).

I must admit, I have chosen my new car (due in two weeks - yay!) partly on environmental and safety reasons due to a desire to act responsibly, but I will not become a lunatic driver, the safety features are to protect me FROM lunatic drivers!

Ian M
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#5 Posted : 16 June 2006 09:25:00(UTC)
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Posted By J Knight
Hi Brett,

I think you are spot on, and to an extent your idea explains why the Clarksons et al of this world are so paranoid and aggressive about H&S.

How would an appropriate hierarchy of control work in practice? Well, for one thnig it would mean some real controls on cars and their drivers. For example, given electronic engine control systems there is no need for a car to be able to move at 100+ mph in order to be efficient at 25 (this was once an argument used to justify over-powered cars). Real controls would mean reductions in top speed. Why is it possible to buy a car which will do 150mph more than the legal limit? The answer is vanity and advertising; and three people paid a very high price for a Sheffield boxer's vanity two years ago when he wrote off his merc mclaren and two other cars in the process. More to the point, indulging the psycho-sexual side of motoring in this way bolsters an aggressive, 'fun' oriented idea of driving. I'm sorry to be a BOF, but a car is a tool, and needs to be designed to do its job, not to answer some deep seated need in the human psyche.

In most cities the average speed is less than 10mph, but you try explaining to most city people that a 20mph speed limit is a good idea and they will tell that nobody would ever get anywhere at that speed; well its twice the speed that people do get anywhere at. So why do people drive souped up Novas in town? Again, its advertising vanity and 'self-image'.

Now I'm not opposed to people having fun, I think its a good thing, and there are loads of ways people can enjoy themselves with the thrill of real or perceived speed that don't endanger others who just want to do their shopping. Myself I ride my pushbike, and believe me 40 on a pushbike feels like well over 100 in a car, ansd since its always downhill at that speed anybody can do it. OK, if I hit somebody on my bike they would be hurt (though rarely killed), but in busy urban areas its just not possible for me to cycle too fast, I need country roads to really get up to speed.

Paragliding's a good way to experinec thrills while limiting the risk mostly to one-self, as is parachuting, parascending, gliding, skateboarding, even water ski-ing and driving a jet-ski. None of these activities (except perhaps the latter) need to happen in places where other people are just trying to earn a crust, the way I am on the A14. So yes, we need to have fun, even high-speed fun, but i submit, milud, that the days of motoring fun on are really past, the roads are far too crowded nowadays, and we need to acknowledge this.

So, apply the hierarchy of control, design excessive speed out of the car,

John
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#6 Posted : 16 June 2006 09:48:00(UTC)
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Posted By Stupendous Man
John,

Appreciate your point of view, but is it really desirable to limit speed through design or control?

If I can present an opposing set of arguments for the discussion:

We need to have vehicles capable of exceeding the speed limit as sometimes this is necessary, for example in emergency vehicles.

Limiting top speed will not reduce the incidences of speeding in the most dangerous environments, built-up areas where there are lots of pedestrians and other road users.

You have described a number of lesiure activities that will get the adrenaline flowing - however, none of them appeal to me as much as driving my car as fast as possible on a race circiut - the branch of motorsport I compete in has classes for road-going vehicles so that joe-public can compete without needing an F1-sized budget.

And, no matter how good the design or control, there will be some 'specialist' or back-street operator who will have the skills and technology to make you go faster - and all this without the R&D budget that a major car manufacturer has at its disposal for developing vehicles safely. In my mind it is safer to have Vauxhall make a fast version of a Nova than have a 'yoof' soup it up.
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#7 Posted : 16 June 2006 10:51:00(UTC)
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Posted By J Knight
Hi ST,

No problem with fast cars in controlled environments such as circuits, but why on public roads?

You can easily add other adrenalin type activities; horse riding, go-kart racing, even off-roading if its on legal tracks and byeways or private land.

Emergency vehicles, likewise, need to go fast, but how fast? Does an ambulance need to do more than say 50 in an urban area? And police cars often need to travel quickly purely to catch people in fast cars; if the suspects weren't going more than 25 why would the police car need to do 100+? In any event, as you say, it would still be possible for specially licensed vehicles to have a higher maximum speed. And as for 'speeding up' in built up areas, acceleration could easily be dealt with in the same way as top speed.

Yes, it might still be possible for a few back-street operators to over-ride electronic controls (but much harder to over-ride physical controls, much of what I propose could be done by various combinations of much smaller engines and gearing); this might mean a few rogue drivers driving too fast, but this would be a massive improvement on a high proportion drivers driving too fast most of the time.

I repeat, the days of the motor car as a victimless object of pleasure are practically over; society just needs to acknowledge this,

John
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#8 Posted : 16 June 2006 11:20:00(UTC)
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Posted By Raymond Rapp
Brett

What about behavouril safety?

I agree with your conclusion that little in terms of enforcement has proved to be effective. I would focus on behavouril safety. In my humble opinion, there is a shocking standard of driving by many road users. Using hand-held mobile phones whilst driving, not indicating when turning, cutting across lanes at speed, the list is endless.

Regards

Ray
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#9 Posted : 18 June 2006 23:24:00(UTC)
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Posted By Brett Day

Raymond, one of the points raised by a contributer was as they put it 'the psychology of driving' I mentioned behavioural safety and they agreed that it was similar to thier thinking, would behavioural safety be in addition to the hierachy or part of ?

As an aside did anyone get the evening standard friday? The evening edition shows a coach driver reading a newspaper whilst driving, he also had a phone conversation (not hands free), but looking at the bright side he was within the speed limit, about the only thing he was doing right, the picture was taken by a passnger. The driver was so unaware that he didn't notice.
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#10 Posted : 18 June 2006 23:37:00(UTC)
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Posted By Brett Day

John

Re: police cars, it's not just speeding drivers that require high speed and many of these high speed chaces are aborted or handed off to the air support unit who can track without fueling the chase, they co-ordinate with ground units who dset up road blocks or stinger traps.

Most of the police high speed drives are not speeding driver related, I would want them to go as fast as safely possible. The downside is that due to budget cuts many forces are no longer using the 6-8 week Class 1 training and test and are resorting to a 3 week 'Police Advanced' training. The old Cass 1 is THE standard for emergency service drivers with some going on to attain Triple Class 1 status, it recognised around the world it is also a very tough course and test it has a 20% pass rate and is also subject to continual assessment. The Police Advanced aims to pass 100% of candidates.

Funnily enough those forces with the Class 1 training still in force happen to be those with the lowest accident rates.

I did notice a post about Brake, I did have personal involvement with them a while back but found that thier is a heavy reliance on emotion and my circumstances would have been mis-represented had I given permission, I know of others who have been in similar circumstances so am reluctant to recomend them
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#11 Posted : 19 June 2006 06:56:00(UTC)
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Posted By Mark Mace
speed seems to be one of the prevalent reasons for controlling vehicles, i have a much better idea if the government taxes fuel high enough, we will not be able to afford the fuel, therefore we will not require a car, nil risks from cars as there would not be any, problem solved.

More seriously i own a 200mph motorcycle, its average speed over the last 20000 miles probably somewhere around 30- 40 mph, its called being responsible with the throttle, anyone caught not capable of this should be banned PERMANENTLY.

The car manufacturers like most other companies wish to sell there product; it has to be better than the competitions in every respect including speed, and acceleration, safety items fitted, looks, colour, comfort, and percieved image. They do this very well.

How many of us drive cars far more powerfull than we really require?

regards
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#12 Posted : 19 June 2006 11:56:00(UTC)
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Posted By John Lewis
Two thoughts. In Holland apparently there is a scheme being tested whereby in a particular town centre all of the traffic calming, pedestrian protection, traffic light systems have been removed all together. The road has reverted to a "Fail to Danger" situation. Everyone cycles, drives, walks with far more care than previously. If this is proven to work, does it suggest that Danger is a far better motivator than Safety?

Second point. My brothers late Father in law worked at the TRRL in Crowthorne and told us a tale of testing steering wheels. This was before the days of air bags and they tried various types of padded steering wheel with more and more ridiculous amounts of padding. As a joke, one standard wheel was fitted with a 10inch spike in the centre. In the event of an accident the driver would have skewered himself on the spike. A major contribution to road safety. When the Transport Minister came for a jolly the spike wheel was "inadvertently" left on show. The Minister thought it a great idea.

Best Regards
John
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#13 Posted : 19 June 2006 12:21:00(UTC)
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Posted By steve e ashton
My take on this:

ERIC
Eliminate: Legislate cars off the road. Environmentally, its the only way forward. Provide suitable alternatives and heavily penalise unnecessary use. (Listen to the outcry when this is proposed!)

Reduce: Technology exists to limit speeds by using roadside electronics with in-car implants. (Why are so many opposed to this?)

Isolate: improve car/pedestrian segregation (Higher kerbs, more over/underbridges. (we've got some of this, but much more could be done...)

Control - basically what we already have - NCAP tests, seat belts, airbags, ABS, EDL, speed cameras, police enforcement etc.

I agree with the first post - we've got the priorities upside down!

Steve
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#14 Posted : 19 June 2006 12:30:00(UTC)
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Posted By Richard Davis
JK,

With respect fella.... I feel your announcments that the "days of motoring fun are past" and "the car as a victimless object of pleasure are practically over".... is the biggest load of twaddle I've heard in ages!! Society dosen't need to acknowledge this at all!

I'm delighted you experience such pleasure from your bicycle, but at 40mph down a counrty lane, I'd fear for your welbeing and that of other road users (including walkers). But that's your choice and it's not my place to tell you to ride slower incase you hit someone..... therefore it's not your place to inform society that the car no longer an item of pleasure.

The classic car scene is enjoyed by hundreds of thousands of people every year, and most the year round. The motorcar is NOT just a mode of transport, nor is a bicycle or motorbike, but it seems the car is where most accusing fingers are pointed and extra taxes levied from.

Rant over....

Can't see how lower geared or restricted cars would work in practice. The economic downturn with lower productivity (due to workers taking twice the time to get to work) would negate any potential savings due to a possible lower accident rate.

The cost to retro-fit limiters to existing cars would be prohibative, and I can't see many owners being enthusiastic about the thought of their pride-and-joy returning from a trip to the garage now limited to 20mph!!!





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#15 Posted : 19 June 2006 13:03:00(UTC)
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Posted By Brett Day

John IIRC it was Montana that removed all roads signs, markings and most of teh limits, funnily enough instead of the predicted road carnage, it was found that average speeds reduced and that the accident rate started to shows signs of dropping, however, this experiment came to an abrupt end and was never fully followed through, to many complaints and too much lost revenue from speeding tickets.
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#16 Posted : 20 June 2006 10:13:00(UTC)
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Posted By J Knight
Richard,

don't and can't agree. I know that people like cars, but its a bit like smoking really, a habit that can be broken. I sat on the M62 yesterday travelling at about 20 minutes per junction; this is reality, the wide-open road is already a myth.

I only ever let my bike have its head with a very good line of sight; one of the principle differences between a pushbike and a car is that if I hit somebody I'm in as much trouble as they are; it really breeds a very different attitude to other road users.

And as for the economic cost of slowing everybody down; see my coment on the M62.

Anyway, I know that slow cars will never arrive, so where in the rest of the hierarchy should we start? Driver training is an obvious one really, but there is an issue here. We have a huge culture of wilful ignorance about the highway code and safe driving, which subverts any training people need to get through the test. How do we ensure post-training compliance? Anybody can pay lip-service to safety to get through their test, once they've passed a significant minority just do what they want until (unless) they get caught. Safety cameras aren't an option, as they won't catch stuff like tailgating (though there was some publicity about tailgating cameras, what happened to them), undertaking, failing to indicate and general self-centred lack of consideration. There will never be enough police on the road to deal with the volumes of traffic we have now, so how do we get the wilful to drive with some thought for others?

John
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#17 Posted : 20 June 2006 11:07:00(UTC)
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Posted By Ian Mitchell
Have to say I agree with Richard, but didn't want to compromise my safety reputation on a professional forum! As a classic and performance car enthusiast, I love driving for the pleasure of it, and summer is the ideal time to get up at first light on a sunday and remember what an open road feels like! (Agree - No need to break the limit to enjoy it though!).
As a safety professional, I really do have to agree with JK's statement with my head. However, I think with my heart on this matter and I am certainly not alone!
I do disagree with the high and mighty philosophising though about what society 'needs' to do, and I think it was this tone that got our backs up rather than the safety argument.

PS JK and anybody else - if you want to avoid the M62 snarl-up in the rush hour take the lovely Denby Dale - Holmfirth - Mossley route from Manchester - Wakefield. It's only about 10-15 minutes quicker despite saving 15 miles, but is a real driver's road mixing windy lanes, long straights and nice villages including a view of Nora Batty's cafe!!
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#18 Posted : 20 June 2006 11:19:00(UTC)
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Posted By J Knight
Sorry about the high and mighty tone; I do realise that this is a bit of a hobby horse of mine, and I am sorry for ranting on ;-)

John
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#19 Posted : 20 June 2006 13:10:00(UTC)
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Posted By Tabs
John, some of your points are valid for those who want to feel like they are at work every minute of their life. My turn for a rant, please read the following in a happy tone though - this is not any type of attack, just an alternative viewpoint.

I am a citizen and whilst I appreciate that enforcement has devolved to the government, police and the road makers, I will continue to insist on my rights to enjoy my spare time as I choose - so long as I don't infringe on anyone else's life too much.

Your travelling on a comparitively flimsy construction at 40 MPH presumably with a cyclist's helmet on does not make me feel good about your survival chances should you have a spill. As an ex advanced motorcycle instructor, I happen to know what can happen to the human framework at 20 MPH, let alone 40. Accidents even happen on roads with good views (but you already know that, I am sure).

I am not a car fanatic, much prefer motorbikes, but my age and statistics mean I am probably better off on 4 wheels now. I still want to be able to get in my car (NOT a tool by the way, I do no work with it) and drive at will around the countryside.

I do this on a very regular basis and hardly EVER find myself in snarl-ups. Maybe that is because I use the train to go to work?

You cannot seriously tell those of us that get out in our cars for fun, that the days of enjoyment are over. Why should we want it to be?

Sorry John, but the way you are talking makes me a little scared that at some point in the future (were you to be in charge) all of my personal choices would be made by others. No thanks.

Happy to admit that cars with the ability to go much beyond the speed limit are not really needed - but I wouldn't like to force evryone to drive a Fiat 126 ! There has to be a way to retain power but cap speed. Start today and in a few years time we would be most the way there.

With regards to hierarchy try:

Ellimination: Make public transport so good we all use it, make sure everywhere we want to visit stays open long enough for us to get there

Substitution: Make public transport so good...

Separation: The UK have just said that they (we) won't insist that new cars have the new auto-dial emergeny number feature - what chance have we that they (we) will introduce automatic radar-controlled separation?

Information and Training: Make it easier for people to access high-quality training, continuously reinforce it through proper use of TV papers etc., instead of reality TV.

Protection: This is the safety cell that F1 has developed - easy enough to fit to all cars if we really wanted to try.
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#20 Posted : 21 June 2006 09:00:00(UTC)
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Posted By Richard Davis
John,

You may recall the recent adverts highlighting the need to use seatbelts in the back of cars.... I think the gist of it was "and un-restrained passenger thown forward after a 30mph collision, has the force of a small elephant and can easily kill the front people up front" I'm no physics master, but the same laws may apply to your bike..... and you've got pointy bits on it!!! :)

I'd go for a carrott and stick approach. Free bus travel for anyone under 25 for a start (largest RTA casualty rate pro-rata in that age group). Heavily subsidised train travel (automatically send travel cards to everyone at 14ish, much as we get sent a NI number).

For the stick. Video cars (un-marked) film inconsiderate and dangerous driving, send copy disc to driver with £30 fine and explanitary note of why. Public information films (just 20secs, during advert breaks when the footies on, Men and Motors, any other time target audiance are likely to be watching) encouraging people to take pride in their driving. Heavily subsidise advanced driving courses, like IAM and give attendees a spin in a rally car as a sweetener. Write to all BMW owners informing them the lever on the left of the steering wheel is a device for letting others know which way they are going.....!! :D

BTW.... open roads are still to be found and enjoyed at sensible speeds. This Sunday I'm joining 40 or so like-minded sports car owners for a trip through Sussex which culminates in a display at Brighton Marina. Anyone in that neck of the woods, come and say hello.

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#21 Posted : 21 June 2006 17:02:00(UTC)
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Posted By Ian Mitchell
JK - don't worry, we all have our pet subjects (me included), so will just agree to disagree on this one!

Richard, enjoy the run out at the weekend. PS, I have just bought a new BMW 3 series and if you so much as sneeze on the indicators it sets them off, followed by 5-6 cycles of alternate left and right indications as the driver frantically tries to cancel them. It is safer not to bother!!
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#22 Posted : 22 June 2006 00:14:00(UTC)
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Posted By Brett Day

Richard, thanks for the ideas, not so sure about umarked cars sending the video in the post with a fine (too much like what we do now with cameras), but why not pull the driver over, the old style 'acid' comments and lecture were effective enough when we did have sensible levels of traffic police on the roads, afet all if they are driving in an unsafe manner why allow them to carry on driving?

At present we are relying heavily on speed, the 'official' statistic is that a third of accidents are caused by speed (that is subject to some debate as there have been some interesting items lumped under the speed catagory such as weather), however, we are spending more and more time, money and resources on speed enforcement. In the first five years of the camera partnerships some counties spent between 55 & 70% of thier road safety budget on speed enforcement.

Under the hypothecation scheme, camera partnerships take out the money that raised from fines to cover operating expenses. The rest goes into central government funds. NOT road safety budget or transport safety but central funds to be spent anything.

Given that at least 15 counties are 12 years behind on basic road maintenance and 19 are 3 years behind on 'emergency' engineering works (traffic engineering at accident black spots and the like), shouldn't the money being raised from cameras be going back into road safet and only road safety.


I don't advocate speeding but am concerned that this emphasis on speed is at best only going to acheive a 30% improvement, it is very emotive and is being done at the expense of the other 70% of causes of accidents on our roads.

As for performance, I'm not interested in 0-60 I'm very interested in the 30-60 time or 'overtaking acceleration'.


Coming back to John Lewi's post abou the spike on the steering wheel, I fear we are concentrating too much on secondary safety i.e. that which protects when an accident occours at the expense of primary safety i.e. that which helps prevent accidents.

Have driven quite a few new model cars in the last 12 months and found that whilst they score highly on crash worthiness, have very poor visbilty past the 'A' pillars, tio get a good view I move my head from side to side to alter the view.
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#23 Posted : 22 June 2006 09:01:00(UTC)
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Posted By Richard Davis
Ian - I've driven cars with over sensitive indicators like yours (Vectras are the same IIRC), so appreciate your prediciment!

Brett - The unmarked/disc/fine idea seems a little harsh on reflection, and I agree with your point that if someone is driving below an acceptable standard they should be stopped. In the "olden days", the copper would pull you over, say you've been riding/driving like a moron..... tell you they were going to let you off this time, then you were on your way. IMO, the sense of relief was enough of a shot across the bows to make you change your ways.

We respected and feared police in equal measures as young road users, but that seems not to be the case now.
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#24 Posted : 22 June 2006 10:09:00(UTC)
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Posted By John Lewis
Brett

The spike on the steering wheel idea was portrayed to me as a semi joke by the Engineers at the time. The thought process was that if the consequences of bad driving were almost certain serious injury for the driver, then he would certainly drive more cautiously. I doubt it was ever thought of as a secondary safety measure. Certainty of injury is more a primary measure.

I have no doubt about the truth of the steering wheel spike, but suspect my leg has been pulled as regrads the response.

Best regards
John
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#25 Posted : 22 June 2006 10:34:00(UTC)
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Posted By J Knight
eyup,

Thanks for your concern about my safety when I'm on my pushbike; but I think you've missed my point. Pushbikes are, by and large, about the rider's safety. The thing about cars though is that they are much more dangerous to practically everybody else than they are to the drivers of the things. Have you ever tried, in a safety session, asking delegates if safety was a factor in their choice of car? You'll get some people saying yes. Then ask them if pedestrian (or cyclist or horserider, or skateboarder or whatever) was a factor, and I guarantee you'll get blank looks.

You see, I don't care too much about people indulging in dangerous activity (except at work of course), provided they put only consenting adults at risk. Car drivers are a much bigger risk to others' lives than they are to their own, and that's my problem. in my view, everybody has the right to take risks with their own lives and property, but no right at all to take risks with others' lives without explicit consent. So, btw, I don't ride my pushbike on pavements, I cycle slowly in towns, and so on,

John
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#26 Posted : 22 June 2006 11:08:00(UTC)
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Posted By Raymond Rapp
Brett

Apologies for the late response to...'would behavioural safety be in addition to the hierarchy or part of it?' I suppose it would be part of it. However, a central part of it, because road accidents occur because of peoples inability to drive safely.

The rationale is that we can cannot properly enforce good driving practices despite the many laws and only a very small percentage of road users actually get penalised in the Courts. For example, speeding is probably the most flouted law of the land. In itself speeding is not necessarily the direct cause of an accident (possibly a contributory factor), more likely poor driving practices. Sometimes quite reckless. I have often wondered if people actually behave out of a car like they do in it.

I think much more research needs to be done in the causation of road accidents, in particular motorway accidents, where there are probably the most fatalities and serious injuries. Anyone up for a PhD?

Regards

Ray
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#27 Posted : 22 June 2006 11:17:00(UTC)
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Posted By J Knight
Ray,

Most fatalities and serious injuries (of cars drivers and passengers) occur on extra-urban single carriageway roads, a high proportion of these being due to ovetaking, with over 100,000 rtc's per annum according to a figure I read in the Road Safety Forum (though that seems incredibly high to me). Most pedestrian injuries occur on 30 mph urban roads.

Speed is the most significant risk factor in all road traffic injuries/fatalities, and could be said to be the cause. Do we care about non-injury rtcs?

Agree entirely about the obstacles in the way of improving driver behaviour; I don't see any way for that to happen the way things are at the moment. Something like 60% of all drivers think they are better than average, so most people don't even consider that their driving needs to change in any way,

John
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#28 Posted : 22 June 2006 14:39:00(UTC)
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Posted By Raymond Rapp
John

Thank you for that information. I find the speed 'thing' fascinating. Is it, I wonder, really speed that is the root cause of the accident or an underlying cause? My instinctive feeling tells me it is not speed but poor driving practices that cause most accidents. You could be under the legal speed limit in fog, rain, wet and slippery roads but still not driving safely.

Regards
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#29 Posted : 22 June 2006 15:25:00(UTC)
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Posted By J Knight
Hi raymond,

I think you're right about speed as the cause of accidents; it is often a contributor rather than a principle cause; where speed is implicated is in the cause of injuries/fatalities, here in my view it is always a principle factor. Have a look at www.brake.org.uk and RoSPA for info about this sort of stuff, they have loads of useful info.

The original title of this thread was about the appliaction of the hierarchy of controls; a large number of respondents have discussed training and the provision of information. This sort of approach is at the bottom of the hierarchy, even below PPE such as seatbelts and airbags.

So for those who reject engineering controls on the vehicle (further up the hierarchy than training), what robust measures would you propose? I would agree that engineering the roads can be effective, the evidence being that motorways are safer than single-carriageway country roads. But motorways protect only drivers and their passengers; they are so dangerous to the unprotected that they are largely banned; the exception being (fast)motorbikes. So this kind of safety engineering clearly isn't an option on a large part of the UKs road network, unless we want the whole extra-urban road network to be off limits to anything other than cars,

John
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#30 Posted : 23 June 2006 03:05:00(UTC)
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Posted By Brett Day

Speed is a factor in all accidents by virtue of the fact that the vehicle is moving, however, if we look at Hazard, Risk and Severity, speed is a severity factor in most cases, so by concentrating on speed we are in effect accepting that accidents will happen and that we should concentrate on reducing the severity of said accidents.

The original one third statistic came from TRL323 a document that even though there are more recent and more rigerous studies is still seen as the holy grail for speed camera partnerships and organisations such as Brake.

The most up to date study was conducted by Hampshire County Council the causes were:

Driver Error: 65.6%
Excessive Speed: 11.4%
Driver Impairment (Prescription drugs, illegal drugs & alcohol): 4.8%
Action of pedestrians: 1.8%
Road Conditions: 3.7%
Vehicle Defects: 1.3%
Weather Conditions: 4.4%
Other: 7.0%


It is interesting to note that the TRL323 report that is given so much status officially actually lumped Weather conditions & Road conditions into the Excessive speed catagory.


Of the Excessive speed acidents these were broken down thus:

67%: Under the posted speed limit but inappropriate for the road, weather or traffic conditions
8% Over the speed limit, legal (as in taxed, insured, legally entitle to drive the vehicle used in the offence) and affected by enforcement
8% Over the speed limit, legal and unaffected by enforcement (emergency services vehicles)
17% Over the speed limit and lawless (vehicles used in crimes, stolen and unroadworthy vehicles).

However, this study is often brushed aside as not being relevant, why? I'm not sure but rather suspect that it calls into question or current obsession with speed enforcement.


I did mention the Montana experiment and have found the link:

http://www.hwysafety.com/hwy_montana_2001.htm
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#31 Posted : 23 June 2006 09:04:00(UTC)
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Posted By J Knight
Hi Brett,

It depends on who is defining excessive, if you ask me. I think I do regard collisions as inevitable, given the volume of traffic on the roads, and the fact that since driver skill will always folow a poisson distribution there will always be drivers who just aren't up to it on a given day, and I am therefore mainly concerned with limiting their severity; its not RTCs as such but injury/fatality RTCs that cause the grief,

John
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#32 Posted : 23 June 2006 09:11:00(UTC)
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Posted By J Knight
The Montabna results are fascinating, but once again its written from a motorists point of view; my contention is that such studies (and the attitude of groups such as the Association of British Drivers) concentrate almost wholly on injuries to drivers and car passengers; what happened to Monatana's fatality rate for pedestrians?

In any event, this is one study from one state, and can be set against ogther observations like the significant drop in road casualties following the lowering of speed limits on US roads after the oil crisis of 1973.

If anybody can suggest a mechanism by which putting a few signs up at the side of the road can cause a 111% increase in collisions, I'll give them a sweetie. Correlations without a mechanism go nowhere. My age is exactly correlated with the distance of the Sun from Alpha Centauri, but its not me thats doing the pushing, I promise,

John
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#33 Posted : 23 June 2006 11:52:00(UTC)
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Posted By Raymond Rapp
Checked out Montana road safety and I agree with the previous comments, in that the empirical research looks very dubious.

Obviously road side controls are an important safety measure and therefore need to be properly considered and monitored for their desired effect. That said, there is the 'migrant' principle, which dictates that by removing the causes of say an accident blackspot, it sometimes migrates it further along the road. Hence the problem is not really solved at all. An analogy would be widening a road to remove a bottle neck, only achies moving the bottle neck further up the road!

Regards

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#34 Posted : 23 June 2006 16:13:00(UTC)
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Posted By J Knight
Just to bear out the post by Ray; check out http://www.doj.mt.gov/en.../annualreportpage24.pdf. This shows no dramatic increase in fatalitites between 1999 and 2000, which is when the speeding laws were introduced in Montana; there isn't a decrease either, in fact there isn't very much change at all,

John
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#35 Posted : 23 June 2006 17:12:00(UTC)
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Posted By Brett Day

The problem with the Montana experiment is that it seemed to show an improvement but was not followed up with and as you say John other parties such as pedestrians were not included.

Excessive speed is an emotive term but as is often not defined is vague, given that speed can be excessive and over the legal limit, and it can be excessive whislt within the limit but inapprpriate for the road, weather and traffic conditions.

The definition of excessive seems to have altered over the years (looking at TRL reports over the years).


In terms of Raymond's suggestion re: behavioural safety, not being a great deal of knowledge on this subject, how would we implement it?
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