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Post by Thilina on Nov 18, 2015 13:32:17 GMT 5.5
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Post by ajith on Nov 19, 2015 7:51:13 GMT 5.5
Did any body see mini roundabout in Sri Lanka ? According to wiki mini roundabout is painted circle in the junction wiki.openstreetmap.org/wiki/Tag:highway%3Dmini_roundaboutDo we see this kind of things in our roads? Thilina what you pointed out is exactly talk worthy. According to the definition we have no such features anywhere in Sri Lanka. I have already marked around 10 of such places erroneously (according to the definition).
I referred a research paper done in UK (Where we inherited all the road rules and features) clearly shows that we have none. What I refer here are the typical places where raised round structures encircling a lamp post, a tree or a religious symbol. Then another problem arises, are they really normal round-abouts or something else?
Extracted from this research paper
Definition of a Mini-Roundabout
A mini-roundabout is a type or form of
junction control at which vehicles circulate
around a white, reflectorised
1,central circular road marking (central island) of between one
and four metres in diameter, as shown in
TSRGD diagram 1003.4.Vehicles entering the junction must give way
to vehicles approaching from the right, circulating the central island.
2 The central road marking is either flush or
slightly raised as a dome
3 (no more than 125mm), in order that it can be driven over by
larger vehicles that are physically incapable
of manoeuvring around it. The dome is also
raised to discourage vehicles from driving
over the central island
4.Three white arrows
are painted on the carriageway, within the
gyratory area, around the central road
marking, showing the direction of circulation.
) |
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Post by sadeepa on Nov 19, 2015 14:28:22 GMT 5.5
Did any body see mini roundabout in Sri Lanka ? According to wiki mini roundabout is painted circle in the junction wiki.openstreetmap.org/wiki/Tag:highway%3Dmini_roundaboutDo we see this kind of things in our roads? Thilina what you pointed out is exactly talk worthy. According to the definition we have no such features anywhere in Sri Lanka. I have already marked around 10 of such places erroneously (according to the definition).
I referred a research paper done in UK (Where we inherited all the road rules and features) clearly shows that we have none. What I refer here are the typical places where raised round structures encircling a lamp post, a tree or a religious symbol. Then another problem arises, are they really normal round-abouts or something else?
Extracted from this research paper
Definition of a Mini-Roundabout
A mini-roundabout is a type or form of
junction control at which vehicles circulate
around a white, reflectorised
1,central circular road marking (central island) of between one
and four metres in diameter, as shown in
TSRGD diagram 1003.4.Vehicles entering the junction must give way
to vehicles approaching from the right, circulating the central island.
2 The central road marking is either flush or
slightly raised as a dome
3 (no more than 125mm), in order that it can be driven over by
larger vehicles that are physically incapable
of manoeuvring around it. The dome is also
raised to discourage vehicles from driving
over the central island
4.Three white arrows
are painted on the carriageway, within the
gyratory area, around the central road
marking, showing the direction of circulation.
) Sorry Guys, I have not logged in for couple of days. Just saw this. Yes, we now have mini roundabout !
I know one place, thats Thalawathugoda Junction. Earlier there was normal roundabout with concrete brick edges, But now there is only a white circle painted on the road, no arrows or any thing else.
I do not see any big issue about what we have marked so far, I think we neither have full fledged roundabouts too. And I don't mind customizing these definitions (rather guide lines) as suitable for our country as long as they are consistently followed . |
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Post by Thilina on Nov 19, 2015 17:23:43 GMT 5.5
Ok , if we have one really there is problem. Because I saw several junctions marked as mini roundabout. When we processing , means converting to other format , we need to think on this (I am middle of writing new mp converter it's no use to struggle for run that pearl script. that's why got this problem) . Actually if we don't have them we can just ignore while converting. But if we really have them we need to process this as roundabout. For that we need to get rid of incorrect ones. Else we will see roundabouts in junctions  |
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