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#1
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Slippery when wet
I went a bit sideways this morning on roads covered in rubber particles and
diesel, nicely lubricated with water. I put my feet down and stood up (wierd, the process of not-falling-off a recumbent bike) and kept going - I moved about three or four inches standing up! So I rode a bit slower after that. Hopefully a bit more rain has washed the crud away by now. We are moving into Coldrain, obviously. -- Guy === WARNING: may contain traces of irony. Contents may settle after posting. http://www.chapmancentral.com |
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#2
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Slippery when wet
On Wed, 10 Sep 2003 17:22:44 +0100, "Just zis Guy, you know?" said:
I went a bit sideways this morning on roads covered in rubber particles and diesel, nicely lubricated with water. From today's _New Scientist_ http://www.newscientist.com/news/news.jsp?id=ns99994148 cite Downpour after drought raises road deaths 19:00 10 September 03 Rainy weather influences road deaths in a far more complicated way than previously thought. Rain does not increase the number of deaths in crashes, provided it rained the previous day. But a heavy shower after a dry spell causes a lethal surge in accidents .... Eisenberg suggests that during a drought, engine oil and grease build up so that when it rains the oil and water mix turns the road into a skidpan. And people are also not as prepared for these conditions after a long dry spell, he says. .... cite -- Alan J. Wylie http://www.glaramara.freeserve.co.uk/ "Perfection [in design] is achieved not when there is nothing left to add, but rather when there is nothing left to take away." -- Antoine de Saint-Exupery |
#3
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Slippery when wet
Alan J. Wylie wrote:
And people are also not as prepared for these conditions after a long dry spell, he says. No ****, sherlock. Sometimes I wonder whether some of these scientists ever venture into the outside world. |
#4
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Slippery when wet
"Just zis Guy, you know?" wrote in message ...
I went a bit sideways this morning on roads covered in rubber particles and diesel, nicely lubricated with water. I put my feet down and stood up (wierd, the process of not-falling-off a recumbent bike) and kept going - I moved about three or four inches standing up! So I rode a bit slower after that. Hopefully a bit more rain has washed the crud away by now. We are moving into Coldrain, obviously. You were lucky, Guy. Two weeks ago my wife was caught in a massive downpour and came off, breaking her collarbone. She now has a plate and 5 screws in her shoulder. Mind you, A&E didn't ask if she was wearing a helmet (although that did get pretty mashed up)! Michael MacClancy |
#6
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Slippery when wet
I went a bit sideways this morning on roads covered in rubber particles and
diesel, nicely lubricated with water. snippity... You may be interested in the following... http://www.newscientist.com/news/news.jsp?id=ns99994148 "Downpour after drought raises road deaths 19:00 10 September 03 Rainy weather influences road deaths in a far more complicated way than previously thought. Rain does not increase the number of deaths in crashes, provided it rained the previous day. But a heavy shower after a dry spell causes a lethal surge in accidents. Daniel Eisenberg of the University of California, Berkeley, stumbled across the link while studying the dangers of driving under the influence of drugs. He knew that there are more accidents on rainy days and wanted to show that this factor was not influencing his results. But when Eisenberg calculated the annual and monthly figures for rainfall taken from the US Weather Service's 20,000 weather stations, and compared it with nearly 430,000 fatal crashes between 1975 and 2000, he found that the number of deaths fell in rainy months. It was only when he looked at the daily figures that he found the expected result - a 1.2 per cent increase in the rate of fatal crashes with every centimetre of rain that falls. Engine oil and grease Eisenberg says the longer the dry period before it rains, the higher the number of deaths (see graph), so a dry month with a downpour can have more deaths than one with incessant drizzle. He found that the combination of a shower after a 21-day drought increased the number of fatalities nearly threefold. "I think my study is the first with large-scale data to show the magnitude of the effect," he says. The work will appear in Accident Prevention & Analysis. Eisenberg suggests that during a drought, engine oil and grease build up so that when it rains the oil and water mix turns the road into a skidpan. And people are also not as prepared for these conditions after a long dry spell, he says. Adrian Runacres, a forensic accident meteorologist at the UK's Transport Research Laboratory at Crowthorne, says that tests in the UK have confirmed that the build-up of dust and rubber from tyres can form a greasy film when it rains. "Also the crud that builds up blocks drainage paths between the chips on the surface of the road," he says. But Runacres says that the most important factor is probably motorists driving in heavy rain as though it were still dry, and tailgating other vehicles. Eisenberg says that highway authorities should warn motorists of the added danger when it rains after a drought. Mick Hamer" Cheers, helen s ~~~~~~~~~~ This is sent from a redundant email Mail sent to it is dumped My correct one can be gleaned from h*$el***$$n*$d$ot$**s**i$$m*$m$**on**$s$@*$$a**$*o l*$*.*$$c$om*$ by getting rid of the overdependence on money and fame ~~~~~~~~~~ |
#7
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Slippery when wet
"Alan J. Wylie" wrote in message
k... Eisenberg suggests But is he certain? -- Guy === WARNING: may contain traces of irony. Contents may settle after posting. http://www.chapmancentral.com |
#8
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Slippery when wet
"Just zis Guy, you know?" wrote in message ... "Alan J. Wylie" wrote in message k... Eisenberg suggests But is he certain? Over street ironworks -- Yes. And sit up straight and aspirate your H's young Jedi. T |
#9
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Slippery when wet
"Tony W" wrote in message
... Eisenberg suggests But is he certain? Over street ironworks -- Yes. Not plancks? I'll get me labcoat... -- Guy === WARNING: may contain traces of irony. Contents may settle after posting. http://www.chapmancentral.com |
#10
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Slippery when wet
"Just zis Guy, you know?" writes:
"Alan J. Wylie" wrote in message k... Eisenberg suggests But is he certain? Yes, but where he's certain he's unprincipled and where he's principled he's uncertain. Simon (probably) -- (Simon Brooke) http://www.jasmine.org.uk/~simon/ ;; "If I were a Microsoft Public Relations person, I would probably ;; be sobbing on a desk right now" -- Rob Miller, editor, /. |
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