[talk-au] Our work in last two weeks

Mark Pulley mrpulley at iinet.net.au
Wed Jan 23 21:43:58 UTC 2019


I generally split these ways. A couple of reasons:

1. Traffic is generally not meant to make U-turns here. Occasionally there is an explicit no-U-turn sign, but most of the time there is a double white line extending from the end of the median strip preventing turning.

2. If a route relation uses the road, then it is required to split the road, as traffic following the relation doesn’t do a U-turn. As an example, have a look at https://www.openstreetmap.org/relation/1284045 <https://www.openstreetmap.org/relation/1284045> - ways https://www.openstreetmap.org/way/175260353 <https://www.openstreetmap.org/way/175260353> and https://www.openstreetmap.org/way/175260354 <https://www.openstreetmap.org/way/175260354> are the respective forward members for each direction of travel. (Probably easier to see in the relation editor in JOSM) 

Mark P.

> On 22 Jan 2019, at 8:23 am, Nemanja Bračko <brackone at gmail.com> wrote:
> 
> @Warin,
> 
> I personally do not see why is it wrong if you split? It is just two segments merged in one node. Geometry and data are exactly the same just it is represented as two, instead of one line.
> 
> If we go deeper in this issue, it is actually wrong, because you have marked/mapped 2 physical segments with just one line. Angle is not natural for any road. However, it doesn't make any difference in routing so it is acceptable to be mapped as one line in cases like this.
> 
> Thanks,
> Nemanja

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