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How should we name links connecting intersecting roads?
Take way 152600521 for example. I have named the link leading from 3 to 317 the same as the road it leads to, hence 317. From my point of view it is beneficial because when the turn is announced on the GPS it show up as a turn onto 317.
http://www.openstreetmap.org/?lat=12.62 … 8&layers=M
What about giving the link a name that reflects what is written on the corresponding exit sign, like "7 Bangkok" or "344 North"? It would look great on the GPS.
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Thanks!
Those links answered my question. I will use tag 'destination' and/or 'ref' on links if desired. I will not use 'name' on links at all.
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You should always use 'ref' for road numbers, not name. It seems you have 'named' h'way 4 in Laos right through... If you use 'ref' then the number will appear on some maps (like Garmin) in a box, rather than very small along the road.
Regards,
Peter.
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You should always use 'ref' for road numbers, not name. It seems you have 'named' h'way 4 in Laos right through... If you use 'ref' then the number will appear on some maps (like Garmin) in a box, rather than very small along the road.
Regards,
Peter.
I always put a name in 'name' and a ref number in 'ref'.
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Speaking of links.
Should we use highway=*_link for frontage roads running parallel to some roads for long distances, like 34 in Bangkok for example?
Last edited by RocketMan (2012-08-16 13:12:54)
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deleted duplicate entry
Last edited by Willi2006 (2012-08-16 13:55:46)
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There are links between the frontage road and the major road. But the frontage road itself is no link. I'm tagging them according to the note on the page Tag:highway=service
Note: This is not the way to tag a frontage road, sometimes called a service road. That should be tagged with one of the other highway=* values, depending on what function the frontage road serves.
Last edited by Willi2006 (2012-08-16 13:56:18)
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Willi2006 wrote:There are links between the frontage road and the major road. But the frontage road itself is no link. I'm tagging them according to the note on the page Tag:highway=service
Note: This is not the way to tag a frontage road, sometimes called a service road. That should be tagged with one of the other highway=* values, depending on what function the frontage road serves.
Thanks. That makes sense.
Edit: But what should the service road be tagged as if it runs along a trunk road for example? Makes no sense to tag it as a trunk too.
What would be a good name for the frontage/service road? "34 Frontage"? Should we add ref=34 to the frontage/service road too?
Last edited by RocketMan (2012-08-16 15:23:53)
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I had a look at the OSM data but I'm not familiar with this area. The major road 34 is classified as trunk and the frontage road was classified primary, i.e. lower. Google maps and other maps which I checked are also classifying the frontage road lower than the major road. Imho that's the right way because the major road is the preferred highway for fast and long distance routing. And thus major roads should be higher classified. Remember the classification is the primary information for routing.
In June Paul_012 changed the frontage road of highway 34 to trunk, the same as the major road, in this changeset with the comment "Bang Na - Bang Pakong Rd --> trunk". May be he can tell us why he did this.
As far as I know the frontage roads don't and shouldn't have highway numbers (ref) but could have the name of the major road appended with "frontage road". The directions "follow the highway 34" and "leave highway 34 at exit x to y frontage road" are meaningful. But the direction "leave highway 34 at exit x to highway 34" would be rather confusing.
Last edited by Willi2006 (2012-08-17 04:38:27)
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I have driven this road a few times.
No matter what classification I think of it does not seem to fit. It does not have the numbering or the physical features and certainly not the speed of a trunk. The frontage road runs a main route so that suggest a primary/secondary. On the other hand there is nothing primary/secondary about it as it serves only as a stepping stone to get on and off 34. If you consider that in places it looks like a city street with shops and parked cars it could be called unclassified.
I also lean towards not using the ref on the frontage road but rather name it "34 Frontage". It runs the same route as 34 but it is not 34. Also, like you said, routing messages would make more sense if they do not have the same name/ref.
I hope I am not wearing you out with all these questions.
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In June Paul_012 changed the frontage road of highway 34 to trunk, the same as the major road, in this changeset with the comment "Bang Na - Bang Pakong Rd --> trunk". May be he can tell us why he did this.
I made that edit in order to properly show Route 34 with four carriageways, and also upgrade it to trunk class since it has pretty much surpassed Sukhumvit (Route 3) in importance. (Most of Sukhumvit between Bang Pu and Bang Pakong is a two-lane undivided road.) I followed what is currently done with the portion of Phahon Yothin (Route 1) between Bangkok and Saraburi and tagged both the main and frontage roads as trunk.
From what I understand, both the main and frontage carriageways are administratively and legally considered to be parts of the same highway. The same default speed limits apply, although motorcycles usually aren't allowed in the main carriageway. When the Department of Highways announces maintenance work on a route, I understand it to be referring to both the main and frontage roads, inclusively.
If we were to strictly follow the DOH's usage, the frontage roads would also have to be tagged with the same ref numbers. I agree though that this doesn't seem very practical in terms of navigation. There doesn't seem to be a bullet-proof method for naming either. Take Phahon Yothin Road, for example. For navigation you'd want to be able to distinguish between the main and frontage roads by name, but in reality no one would give their address as "Phahonyothin frontage road".
As for classification, Google Maps is inconsistent for Route 34; it shows some segments of the frontage in white but further out colours both the frontage and main roads yellow. I guess it depends on whether we want to emphasize the "part of the same road" idea or the fact that the main carriageway has higher priority. A compromise may be to classify the frontage as one level lower than the main road. It wouldn't make much logical sense, but should work for most purposes.
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Both of you have a higher estimate of the frontage road than I do. How about calling it a secondary road? That is over my estimate and under yours, makes for a good compromise? I looked at Dallas where they have loads of frontage roads and they seem to call them secondary there.
Have a look at 3 (sukhumvit) between 34 and the start of 361. I set it to secondary there, I had it as link and it needed to be changed.
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and also upgrade it to trunk class since it has pretty much surpassed Sukhumvit (Route 3) in importance. (Most of Sukhumvit between Bang Pu and Bang Pakong is a two-lane undivided road.) I followed what is currently done with the portion of Phahon Yothin (Route 1) between Bangkok and Saraburi and tagged both the main and frontage roads as trunk.
34 (not the frontage road) should be a trunk without a doubt. I have upgraded 36 and 344 to trunks as they are in fact trunk roads no matter the numbering. 3 (sukhumvit) may not be called a trunk if it wasn't for it has a single digit number. Take the part where it runs through Chon Buri for example. 361 which bypasses Chon Buri and is faster is a primary, but the slower sukhumvit that crosses the city with loads of side streets is a trunk. A person who uses this map but don't know the reality would cross the city rather than using the bypass. If I was the King of OSM I would have 361 classified higher than the part of sukumvit that 361 bypasses. But that is another already dead topic.
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Both of you have a higher estimate of the frontage road than I do. How about calling it a secondary road? That is over my estimate and under yours, makes for a good compromise? I looked at Dallas where they have loads of frontage roads and they seem to call them secondary there.
Have a look at 3 (sukhumvit) between 34 and the start of 361. I set it to secondary there, I had it as link and it needed to be changed.
Since I did not receive any protests I changed the 34 frontage roads to secondary.
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