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PostPosted: Fri Jul 03, 2009 14:39 
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There are significant differences between the way rail crashes and road crashes are investigated. In rail crashes the driver has very little freedom. They can only move forwards or backwards, stop or go. They are not subject to other rail traffic crossing their path unless someone else stuffs up. Road vehicles, pedestrians etc are prohibited on their tracks. In a crash the track is generally torn up and serious damage is made to the train set hence a subsequent enquiry, normally conducted by the track and train owners (or at least dominated by them) tends to be in depth and, as it is easy to demonstrate whether or not there is an operator error, physical issues can be readily found and fixed to avoid repetition. In the case of road crashes the driver has many more degrees of freedom (they can deviate sideways as well as fore and aft) and have to contend with cross traffic, errant pedestrians, variable levels of grip etc. In most cases the investigating authority, as a proxy for the owners of the infrastructure, has suffered no damage. As there is no penalty (loss) on the owner of the infrastructure the tendency is to blame the operator. I do not see that there is an essential difference in causation between a faulty rail and a deceptive visibility situation on the road. Both are infrastructure failures leading to a reasonably prudent operator into a crash. Both have an engineering solution. In neither case does a speed limitation have a beneficial effect.

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PostPosted: Fri Jul 03, 2009 16:38 
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Abercrombie wrote:
Because we have decided to discuss the real world, where people often make mistakes.

Is it better to reduce the tendency for these mistakes in the first place? It's not like there aren't a comparably insignificant number of them.

Abercrombie wrote:
We have no way to choose only good pedestrians.

Why 'choose' them?
We have ways of turning poor ones into good ones, do we not? Should we not focus on that first?

Abercrombie wrote:
So that we can have record low casualty rates each year.

Why not instead have the best possible record by addressing the root cause? :?

I find it a bit odd that there are people who call for stringent, unfair and ineffective measures against one road user group purely on the grounds of safety, who at the same time doesn't mind letting other road user groups be as ignorantly dangerous as they like.

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PostPosted: Fri Jul 03, 2009 19:26 
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Abercrombie wrote:
If it needs to be discussed because it's too vague, then it's --- too vague?

No, "it" needs to be discussed because "it" is the problem! Speed is the easy option to try and treat the symptoms without attempting to cure the disease. It's easy to measure and easy to enforce (oh, and it's a nice little earner on the side! :wink: ) The government / scamera partnerships are behaving in the same way as big, unethical pharamceutical companies are sometimes accused of doing. They have no real interest in getting to the root cause and erradicating the problem, they want something that brings in a steady supply of revenue. Something that doesn't cure the disease but treats the symptoms...

Abercrombie wrote:
Mole wrote:
Abercrombie wrote:
It helps if we talk about the real world, rather than some fantasy version without careless drivers.
Let me tell you a story...


About tracks. But tracks can't make mistakes. People always do.

I think you're (perhaps wilfully?!) missing the point here. Of course tracks can't make mistakes (in much the same way that cars can't)! All these problems are about PEOPLE. Take the people away and there won't be any problems. It's people who fail to take appropriate action in order to ensure that tracks don't break and cars don't run people over. The correct coure of action is to inspect and replace the tracks in a timely fashion before they break and hurt someone. The correct course of action in a car is to drive at an appropriate speed for the conditions. Neither is the cheapest or easiest option.

Of course, if you choose to take the "oh well, shit happens" approach and (effectively) give up trying to solve the real problem, you could always MITIGATE (but not erradicate) the effects of both by forcing trains (and cars) to travel so slowly that neither is of any real use any more.

Abercrombie wrote:
Mole wrote:
Are you asking for a 10MPH speed limit on all roads where there might be a chance of an encounter with a pedestrian then?


No, I'd cut you some slack - twenty's plenty.
.[/quote]

OK, so just for the record then, are you saying that you advocate a blanket 20MPH speed limit on any road other than a motorway?


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PostPosted: Fri Jul 03, 2009 19:35 
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dcbwhaley wrote:
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Interesting concept though isn't it? 8 fataliteis on the rail network and they spend ££££HOW MUCH????! replacing all the rails. I wonder what sort of KSI reduction they'd get if they spent that on the road network?


ISTR that railway engineers value a life at a million pounds (i.e. they will spend that much on the network if one life can be saved), wheras highway engineers value it at a mere one hundred thousand pounds. This is intimately related to both the public's rather distorted perception of risk and the commercial aspect. Rail travellers realise that they are putting their lives in the hands of others and will only do that if their expectation of surviving is very high. This translates into a powerful business incentive to run a safe network lest they lose customers. Drivers, in contrast, think that their safety is in their own, very competent, hands and there is little commercial gain to the highway authority from improving the roads.

And - and you would expect me to say this :) - if the money spent on the road network was spent on improving the railways and encouraging drivers to use the train whar sort of KSI reduction would be seen.


If we're going to talk "KSI reduction per passenger journey, then I, for one, would be very interested to see the results!!! I daresay it would cut both ways - if we spent the same amount of money on the M1 / M6 / M74 as we have on the West Coast Main line, might we also see some pretty impressive reductions? (well, assuming we didn't just spend it on cameras anyway)! :roll:

(Don't get me wrong, I actually like trains, but I accept that the motor car was simply a more convenient solution to the problem of personal mobility)!! it's popularity and success has now brought upon us a load of other problems which we need to deal with.


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PostPosted: Fri Jul 03, 2009 20:08 
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http://www.transport-watch.co.uk/fact-sheets.htm

http://www.transport-watch.co.uk/road-rail-comparisons.htm

http://www.transport-watch.co.uk/transport-speed-cameras.htm

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PostPosted: Fri Jul 03, 2009 20:13 
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Abercrombie wrote:
dcbwhaley wrote:
a mere one hundred thousand pounds.


I've been thinking about this. I question the level, but the approach is right.
I'd measure it against "years of life saved", i.e. I'd value a child's life
much more highly than an older dude's life. Thus, an accident killing
a little kid is 7 times worse than one involving (say) a 65 year old,
because they'll be dead in 10 years, on average, whereas the kid
lost (say) 70 years of life.

It all gets a bit complicated, though.


Sorry, I couldn't resist:

Image


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PostPosted: Fri Jul 03, 2009 22:33 
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OK, so just for the record then, are you saying that you advocate a blanket 20MPH speed limit on any road other than a motorway?

If you think about it, apart from the extremely bad drivers and the terminally hard of thinking, that would lead to a compliance level of roughly 0.000000000000000000000000000000000000000000000000000000000000000000005% on average, so the earning potential for the partnerships would be huge. Almost as big a windfall as the hypothecation scheme.

Thus I can see such a ridiculously short sighted and inappropriate scheme being introduced.


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