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Old April 29th, 2010, 09:28 PM   #21
keber
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Most European countries have winter ploughing service, so cat eyes are an expensive obstruction. Usually paint on road markings is reflective (with added glass spheres), so I don't find much use for cat eyes except in tunnels, objects, guard rails and side posts. However here they are experimenting with LED cat eyes before some pedestrian crossings.

Interesting, I'm looking for side posts in UK like in picture above, but can't find any.
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Old April 29th, 2010, 09:30 PM   #22
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In California they are all over on main arterial roads, especially along the double yellow lines denoting the center line. They are on each side of the double yellow.

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Old April 29th, 2010, 10:49 PM   #23
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I have seen something like that used as temporary road markings.
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Old April 30th, 2010, 10:07 AM   #24
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Quote:
Originally Posted by Fargo Wolf View Post
Those are just standard reflectors on the posts though. Does the Swiss Government mount them to the pavement (Cats Eyes) to denote road lines?
We call them cats eyes wherever they are (As if they turn into something different if you attach them to a post). And as I said there are none on the pavement because of the ploughing services. They tried once to make a line at the road where I live, after the first snow, half of the reflectors where gone.

The use them in tunnels. Of course there is no snow problem there.
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Old April 30th, 2010, 12:06 PM   #25
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In Greece we have this type: (like the photo below) but in white colour. Most of the country roads has it...

Sample:
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Old April 30th, 2010, 07:30 PM   #26
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The practicality of using 'Cat's Eyes' is closely linked to climate. In mild and warm climes it makes sense. In areas where there is snow in the winter, it is impractical and a far better solution is to mount reflective lights on plastic pillars, like in the Swiss example above.

Having said that, reflective markers are used to highlight areas of danger regardless of climate. Of course, the same can be achieved by increasing the density of pillars to delineate the road line.

The whole thing is highly situation- and location-specific and, from a functional point of view, cat's eyes do not offer any tangible advantages over pillars.

Of course, cat's eyes look cool, can be manufactured in many colours and can be used to delineate individual lanes.
But much of this basic functionality can also be achieved with reflective paint at a lower cost per function.



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Old April 30th, 2010, 09:26 PM   #27
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in brazil :





















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Old April 30th, 2010, 10:16 PM   #28
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Cats eyes in my experience are far far more effective than paint alone at marking the road at night.

Of course it doesn't make much sense if the snow plough is just going to destroy them.

They are very common here, especially on the more important roads. Yellow on the edges and white for the lanes, sometimes green for a merging lane.
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Old April 30th, 2010, 10:35 PM   #29
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You're absolutely right. In Bulgaria there are very few roads with cats eyes because of the snowfalls that occure every year! It's sad because they are really much better than any paint marks.
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Old May 1st, 2010, 03:55 PM   #30
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Even if the snow plough doesn't destroy them, they become dirty rather quickly and lose a large part of their reflective power.
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Old May 1st, 2010, 05:37 PM   #31
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Quote:
Originally Posted by earthJoker View Post
And as I said there are none on the pavement because of the ploughing services. They tried once to make a line at the road where I live, after the first snow, half of the reflectors where gone.

The use them in tunnels. Of course there is no snow problem there.
The same problem was encountered here too. with plow blades scraping off the reflectors, which is why they are now recessed into the pavement where they are used.
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Old May 1st, 2010, 08:59 PM   #32
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The UK's hardly tropical and we get snow pretty much every year. I'm pretty sure it's down to the quality of the installtion.
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Old May 1st, 2010, 09:20 PM   #33
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Quote:
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The UK's hardly tropical and we get snow pretty much every year. I'm pretty sure it's down to the quality of the installtion.
Come on, you might have day or two of snow a year (a bit more last year). In my three first years in the UK there was no snow at all. You can't compare it with countries which might have 3 months of snowfall every year.
And even then if UK encounter pathetic amount of snow (causing unimaginable anywhere else in Europe problems) the usual response is rather salting than snowplowing. You can do it as temperature in UK even during snow episodes is just below the freezing point.
Many countries have to relay on snowplowing as it is to cold for salting to be effective.
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Old May 2nd, 2010, 06:35 AM   #34
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You obviously weren't there this past winter then. The UK got nailed almost as hard as the N.E. US. Meanwhile, in Canada's Pacific province of British Columbia, they had to truck snow in from Manning Provincial Park, to Cypress Bowl for the Olympics. One way, that's about a three hour drive.
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Old May 2nd, 2010, 12:11 PM   #35
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Also i forgot to say that here in Greece (especially Athens and Thessaloniki) they use "Cats Eyes" in Bus lanes
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Old May 3rd, 2010, 10:50 PM   #36
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I remember cat-eyes in Greece on most important wide roads, but not on motorways.
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Old May 4th, 2010, 02:01 AM   #37
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Quote:
Originally Posted by TheCat View Post
In Israel they are used on almost all intercity roads (especially non-motorway roads, where IMO they are more useful). Usually the outside shoulders have them, but often also the central/lane dividers.
Here is a typical Israeli road (somewhere in the desert). As you said, they are placed just outside the shoulder lines and along the central line.
These aluminum studs not just shine in the dark, reflecting headlights, but they also force the driver to physically feel the moment when he crosses the line.



Here you can see them on a motorway too. And here they are placed not only along shoulder lines, but along lane dividers as well.




Reflectors used on these roads:





Another type, solar LED road markers were recently installed in many Israeli cities to mark pedestrian crossings.


Last edited by Kalamai; May 4th, 2010 at 06:04 AM.
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Old May 4th, 2010, 03:59 AM   #38
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Quote:
Originally Posted by Fargo Wolf View Post
You obviously weren't there this past winter then. The UK got nailed almost as hard as the N.E. US. Meanwhile, in Canada's Pacific province of British Columbia, they had to truck snow in from Manning Provincial Park, to Cypress Bowl for the Olympics. One way, that's about a three hour drive.
I was here. It was exceptional winter, one in 25-30 years. And you can't seriously compare winter here with NE USA or Eastern Europe. Even as unusual one as the one this year.
In most of the UK snow took hold for no more than week or two with exception of Scotland or higher mountains.
In normal British winter you wouldn't rather expect snow plows. And that's the reason why cat eyes are much more common in UK than in Scandinavia or Eastern Europe or northern USA.
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Old May 4th, 2010, 04:52 AM   #39
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Originally Posted by Rebasepoiss View Post
Even if the snow plough doesn't destroy them, they become dirty rather quickly and lose a large part of their reflective power.
The cats eyes used in the UK are self cleaning. When something drives over them it pushes them down into the housing, this wipes the lens with some rubber and keeps them clean.
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Old May 4th, 2010, 04:58 AM   #40
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Indeed. Like I said, the classic designed ones are intended to be fairly maintenence-proof. Indeed, certain regions of the UK get a lot of snow (okay, obviously not like in Siberia), yet there is no regional variation in their use within the UK.

The cheaper stick-on versions are not as good, nor are their North American cousins, botts-dots.

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