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Old May 4th, 2010, 06:00 AM   #41
Kalamai
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Quote:
Originally Posted by MAG View Post
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.



.
You cannot place pillars anywhere except road sides. And what about the other marking?
Besides, there is another very important feature of these studs. They allow you to sense and to hear the moment when you cross the line marked by them. While this may be achieved by other means (special ribbed lines), I doubt it will be more cost effective.
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Old May 4th, 2010, 03:36 PM   #42
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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.
In Scotland we don't have side posts like in your picture but use side poles which have reflectors. These are used on routes to mark out the path of the road where normal markings, like cats eyes and white lines, can be covered with snow.

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Old May 4th, 2010, 08:21 PM   #43
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I remember cat-eyes in Greece on most important wide roads, but not on motorways.
Yes indeed, there are not cats-eyes on motorways...
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Old August 14th, 2010, 01:23 AM   #44
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CATs eyes
RED ----- YELLOW -----WHITE

Last edited by engenx4; August 14th, 2010 at 03:55 AM.
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Old August 14th, 2010, 03:41 AM   #45
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This is exactly the same standard like in Sweden and Germany.
Hungarian standard almost the same: (white vertical line on the left red vertical line on the right side of the road.)





Hungarian cats eyes:
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Old August 14th, 2010, 02:55 PM   #46
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Portugal uses them a lot on 2x1 roads, but not much on dual carriageways.
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Old August 14th, 2010, 03:00 PM   #47
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Here in Athens (Greece) in some of the roads or avenues (which cats eyes exists) they have been dismantled. They will replace with new stuff, i dont know...
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Old August 14th, 2010, 04:25 PM   #48
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Taiwan uses cats eyes a lot. This is what it looks like:
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Old August 15th, 2010, 12:58 PM   #49
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Hungary.


I havent known that these pillars are so huge


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Old August 15th, 2010, 01:05 PM   #50
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Originally Posted by ChrisZwolle View Post
They're often used on Dutch roads. Not motorways though (I can only think of one location; Interchange Ewijk near the city of Nijmegen).
They are also used on interchage Oud-Dijk when you enter the A12 from the A18. It's used to mark two lanes merging into one.
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Old August 15th, 2010, 09:22 PM   #51
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http://www.youtube.com/watch?v=9qxgXVrqZII Poland A4
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Old August 17th, 2010, 11:26 AM   #52
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In Italy I saw them only in few tunnels, the most recent ones.
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Old August 17th, 2010, 06:08 PM   #53
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Same in Austria.
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Old November 18th, 2010, 03:05 AM   #54
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On this subject, here is an example in Kosovo, look closely at the video towards the end on the hard shoulder white line. You should notice them. This road is newly reconstructed from 1X1 national highway to a full 2X2 semi motorway section. It may mean the government will spread this nationwide as there is a high lack of lighting on Kosovo's national roads. BTW select 720p HD to see the "cats eyes" as some of you here refer to them. If you go full screen you can also see it on the lane dividers on the dashed markings.
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Old December 7th, 2010, 06:10 PM   #55
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A common Cat eyes in Brazil.
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