OpenStreetMap

Lonely no-entry signs

Posted by mwbg on 22 August 2011 in English (English)

There are a few no-entry signs around here, which have no corresponding one-way sign at the other end. People around here swear blind that this means that the whole section of road "beyond" the no-entry (to where ?) is one-way.

I don't think this is correct, and have asked on FixMyStreet for clarification.

I would have thought that this meant that both sections were two-way, but that you simply could not cross in the prohibbed direction from one to the other.

Is this right, that it's merely a zero-length plug ? How would you represent this on OSM ?

Comment from chillly on 22 August 2011 at 11:41

If there are no one-way signs then the no-entry is possibly being used to prevent a rat-run. The no-entry can be represented with a turn restriction, which are not not needed on normal one-way streets.

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Comment from Sanderd17 on 22 August 2011 at 12:05

I think tagging it with a very short oneway part is OK. Otherwise, you could use serveral turn restrictions (but this only makes it difficult for newbies).

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Comment from RM87 on 22 August 2011 at 12:59

As this is not a oneway street than tagging even a small part of road as oneway only confuses other mappers.

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Comment from c2r on 22 August 2011 at 16:36

I personally have used turn restrictions when such circumstances arise...

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Comment from andrewpmk on 23 August 2011 at 02:21

Often there will be a very short stretch of one way road in these circumstances (i.e. there will be a short section of road that is narrowed so that there is only one car lane). In this case, I would use a one way tag.

If there is only a do not enter sign but the road is not one way and the road is wide enough for 2 cars to pass then use a turn restriction. In some cases I have seen do not enter signs which only apply at certain times of day e.g. to side streets off Eglinton Avenue West in Toronto. These are basically turn restrictions.

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Comment from RM87 on 23 August 2011 at 07:22

Even if one part of road is narrower and one end of this section has no -entry sign, it still does not make it a oneway street. It will make it a narrow street you can enter from one direction only. It does not make it a street where you can not drive both directions (you may turn around in the middle of street if you have a smart or some other short car).

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Comment from mwbg on 23 August 2011 at 11:32

Half my respondents said to do it as a plug; half said to do as a turn restriction relation.
I eventually did it as the latter. Can someone check I did it right, please ?
The coords are 52.1119981 -2.3289669.

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Comment from RM87 on 24 August 2011 at 09:31

Currently it is mapped so that you can not drive from east part of the road to the west part of the road, if it is correct then you mapped it right.
Relation itself: http://www.openstreetmap.org/browse/relation/1724174

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