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#1 2008-03-07 22:29:16

Registered: 2008-03-07
Posts: 1

How to tag a single lane restriction in JOSM


I've just started, and have mapped some of Alnwick in the North East UK
using JOSM, and am slowly getting the hang of it I think.

One question I can't find a good answer to on the wiki or forum is how
to tag a road that has a single lane restriction, i.e. traffic can only
pass in one direction at a time.  There's one on a bridge to the north
of Stakeford which is governed by traffic lights and one in the middle
of Alnwick through a monument kind of arch thingy which is just goverend
by good behaviours (no, it doesn't always work).

Obviously you can tag oneway, or a width restriction, but I don't think
that is right.  Anyone have any better ideas (or am I missing something ?)





#2 2008-03-08 04:18:56

From: .se (59.3N17.99E) 0735969076
Registered: 2006-06-18
Posts: 949

Re: How to tag a single lane restriction in JOSM

Hmm just guessing here, but adding width="1 car at a  time" and oneway=no, then add the traffic lights to the map, and a big FIX_ME="this street only carry one car at a time, don't know how to model this".

The thing is it really is an ordinary street just a bit different...


#3 2008-03-08 15:15:50

Registered: 2008-02-24
Posts: 21

Re: How to tag a single lane restriction in JOSM

I just use lanes=1 to indicate the road is only one lane wide.

However Map features states,

"Number of travel lanes in each (or only permitted) direction "

I see it as
"The number of travel lanes on the way".

I don't know how you are susposed to tag single lane roads that are not one way using the map features definition. lanes=0.5 perhaps hmm

Last edited by the_winch (2008-03-08 15:20:51)


#4 2008-04-01 10:09:54

Helge Hafting
Registered: 2007-11-27
Posts: 4

Re: How to tag a single lane restriction in JOSM

we need "lane=single" for this, but there is no such tag yet.


#5 2008-04-02 15:27:57

From: United Arab Emirates
Registered: 2006-05-23
Posts: 213

Re: How to tag a single lane restriction in JOSM

lanes-1 seems correct, as there is only 1 'travel lane on the way' but it's direction alternates.  so it's lanes:1 oneway:no (oneway:no being default anyway)

For generally narrow roads, there are 2 lanes as there are 2 directions of travel, but due to the width these 2 lanes overlap, so lanes:1 is incorrect in this instance.  lane:single is lane:1.  A thin road can be defined by added width: and/or a tag which groups the thin roads into various sizes rather than going for the precision that width= requires.



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