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web:faq:incorrect_routes [2018/03/31 01:28]
admin [Roundabouts]
web:faq:incorrect_routes [2019/09/18 10:29] (current)
admin
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 These cases could be, that Kurviger uses a road that is not accessible. Or maybe Kurviger won't use a Route, even though you know that the road is accessible. No matter how many waypoints you place along the road, Kurviger simply won't take the road. Maybe the turn instructions are incorrect, like a missing street name or maybe no turn instruction was given at all. These cases could be, that Kurviger uses a road that is not accessible. Or maybe Kurviger won't use a Route, even though you know that the road is accessible. No matter how many waypoints you place along the road, Kurviger simply won't take the road. Maybe the turn instructions are incorrect, like a missing street name or maybe no turn instruction was given at all.
  
-Usually, if Kurviger is behaving very weird, this is because there is an issue in the OSM data, obviously this is not always the case, but usually :). If you see such an issue, while planning a route, please help to improve the OSM data. OSM is [[http://​www.openstreetmap.org/​stats/​data_stats.html|used by millions of people]], so you are not only supporting Kurviger but a lot of different projects. You can always let us know in our [[https://groups.google.com/forum/#​!forum/​kurviger|forum]] and we will help you finding the reason for the incorrect results and can report a [[https://​wiki.openstreetmap.org/​wiki/​Notes|note]] in OSM.+Usually, if Kurviger is behaving very weird, this is because there is an issue in the OSM data, obviously this is not always the case, but usually :). If you see such an issue, while planning a route, please help to improve the OSM data. OSM is [[http://​www.openstreetmap.org/​stats/​data_stats.html|used by millions of people]], so you are not only supporting Kurviger but a lot of different projects. You can always let us know in our [[https://forum.kurviger.de/|forum]] and we will help you finding the reason for the incorrect results and can report a [[https://​wiki.openstreetmap.org/​wiki/​Notes|note]] in OSM.
  
 If you are wondering, why you are the first one to stumble over this issue, even though there are millions of users, this could be due to different reasons. First of all, the data is changing all the time, maybe somebody made a change that was not correct. Secondly, Kurviger prefers small roads, most routing software takes you along the highway or is only considering bike or foot routing, where access restrictions are different to motorcycles. Or maybe multiple users are suffering from this issue, but don't know how to solve the issue. We are here to help you! If you are wondering, why you are the first one to stumble over this issue, even though there are millions of users, this could be due to different reasons. First of all, the data is changing all the time, maybe somebody made a change that was not correct. Secondly, Kurviger prefers small roads, most routing software takes you along the highway or is only considering bike or foot routing, where access restrictions are different to motorcycles. Or maybe multiple users are suffering from this issue, but don't know how to solve the issue. We are here to help you!
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 ===== Kurviger Used a Road that is actually Not Accessible ===== ===== Kurviger Used a Road that is actually Not Accessible =====
  
-There can be multiple reasons for that. Here are the most common ones.+There can be multiple reasons for that. Basically there are two types of access restrictions,​ permanent restrictions and temporary or conditional restrictions. When asking a machine to calculate a route, permanent restrictions are easy, it's never allowed to use the road, so Kurviger won't create a route on this road. Temporary or conditional restrictions are a lot more complicated. For example a road is closed on Sundays, Kurviger cannot know if you would like to use this road on a Sunday or not. The Kurviger website allows you to show these potentially closed roads as an overlay, so you can include these in your planning.
  
-==== Construction Sites ====+==== Regular Permanent Access Restrictions ​====
  
-Construction sites are not always tagged ​in OSM. If the construction site is only a short-term construction site (less than 6 months), the general opinion is not to tag itIf the construction takes longer than 6 month, please go ahead and tag it[[https://​wiki.openstreetmap.org/​wiki/​Key:​construction|See ​the OSM wiki for more details]].+Especially for smaller roads, there might be a missing access restriction ​in OSM. You should check that the access ​tag is set correctlyAccess restrictions can be set to ways and nodesGenerally we recommend to tag the ways. Ways also include ferries, so if a ferry is not transporting motorcycles,​ this can be tagged ​for the way of the ferry.
  
-==== Regular Access Restrictions ====+If a road is closed for motorcycles you would tag it ''​motorcycle=no''​. If no motor vehicles are allowed on the road you would tag it ''​motor_vehicle=no''​. There are many different options, most are described in the [[https://​wiki.openstreetmap.org/​wiki/​Key:​access|OSM wiki]].
  
-Especially for smaller roads, there might be a missing access restriction ​in OSM. You should check that the access ​tag is set correctly. Access ​restrictions ​can be set to ways and nodes+=== Construction Sites === 
- Generally we recommend to tag the ways. Ways also include ferries+ 
- so if ferry is not transporting motorcyclesthis can be tagged ​for the way of the ferry+Construction sites are not always tagged ​in OSM. If the construction site is only a short-term construction site (less than 6 months), the general opinion is that it's more suitable to tag it as temporary access restriction (see below). If the construction takes longer than 6 months, it could be tagged as permanent ​access ​restriction[[https://​wiki.openstreetmap.org/​wiki/​Key:​construction|See the OSM wiki for more details]]. 
- ​[[https://​wiki.openstreetmap.org/​wiki/​Key:access|For more information see the OSM wiki]].+ 
 +==== Temporary or Conditional ​Access ​Restrictions ==== 
 + 
 +These can include road closures on the weekend, in the winter, at night, or for a certain period of time. This also includes construction sites shorter than 6 months. Tagging conditional access restrictions,​ might look a bit complicated at first, but don't worry, it's not that complicated,​ we will show you a couple of the common examples and it should ​be easy to extend it for your specific case
 + 
 +Road that is closed for motorcycles on the weekend: ''​motorcycle:​conditional=no @ (Sa,Su,​PH)''​\\ 
 +Road that is closed for some time, like construction site: ''​motor_vehicle:​conditional=no @ (2018 May 22-2018 Oct 7)''​\\ 
 +Road that is closed every year, for example in winter:\\ 
 +The fast and generic option is to use ''​access:​conditional=no @ winter''​. For many roads there is no fixed date, usually ​the road will be closed with the first snow and opened once the snow as removed in spring, so tagging no @ winter is not the worst option, but there is no way to automatically evaluate this.\\ 
 +Some roads usually have close from a certain month to another month, so you could use ''​access:​conditional=no @ (Nov-Mar)''​ for roads that are usually close from November to March. 
 + 
 +There are many more examples in the [[https://​wiki.openstreetmap.org/​wiki/​Conditional_restrictions|OSM wiki]]. If you are uncertain, let us know in our forum, we are happy to assist you.
  
 ===== Why isn't Kurviger using this Road or Ferry ===== ===== Why isn't Kurviger using this Road or Ferry =====
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 Fords are tricky, as they are often seasonal or more challenging after rain. Kurviger will route through fords, but if they are marked as impassable or deep, we will not allow routing over them. If you are routed through a deep ford, consider updating the OSM data or let us know. Fords are tricky, as they are often seasonal or more challenging after rain. Kurviger will route through fords, but if they are marked as impassable or deep, we will not allow routing over them. If you are routed through a deep ford, consider updating the OSM data or let us know.
 +
 +==== Turn Restrictions ====
 +
 +Sometimes it can happen that turn restrictions are entered incorrectly. Kurviger supports basic turn restrictions without via nodes (see [[https://​wiki.openstreetmap.org/​wiki/​Relation:​restriction|the OSM wiki]] for more information). It is hard to spot these issues on OpenStreetMap,​ therefore we recommend to use [[https://​ahorn.lima-city.de/​tr/​|this website]] that makes it easy to find turn restrictions and automatically marks them as potentially erroneous if something seems wrong. ​
  
 ===== The Estimated Duration (ETA) seems not correct ===== ===== The Estimated Duration (ETA) seems not correct =====
  
-We try to calculate a realistic ETA based on the available road data. In general our ETAs good enough for a rough orientation. ​We have seen issues with the ETA if the road data is insufficient. We rely on [[https://​wiki.openstreetmap.org/​wiki/​Key:​maxspeed|max speed tags]] and other road information being present to estimate a realistic ETA. If there is not enough data, we try to estimate a realistic ETA, which might not always be possible. If you have seen cases where the ETAs are completely off, please feel free to contact us or to improve the OSM data. Please also be aware that travel times depend on the weather. A wet and muddy dirt road might slow you down considerably.+We try to calculate a realistic ETA based on the available road data. In general our ETAs should be good enough for a rough orientation. ​However, we have seen issues with the ETA if the road data is insufficient. We rely on [[https://​wiki.openstreetmap.org/​wiki/​Key:​maxspeed|max speed tags]] and other road information being present to estimate a realistic ETA. Another relevant tag for ETA calculation is the surface (see the section about unpaved). If there is not enough data, we try to estimate a realistic ETA, which might not always be possible. If you have seen cases where the ETAs are completely off, please feel free to contact us or to improve the OSM data. Please also be aware that travel times depend on the weather. A wet and muddy dirt road might slow you down considerably ​or might even force you to take an alternative route. 
 + 
 +===== I avoided X but Kurviger still uses a road that is X ===== 
 + 
 +==== Unpaved ==== 
 + 
 +We read surface information from OSM, with some exceptions, we assume that roads are paved, unless otherwise marked. This means, if you avoided unpaved roads, but yet have been routed over an unpaved road, this road is probably not marked as unpaved. 
 + 
 +This could be fixed by adding the surface attribute to the road. Often you would set ''​surface=unpaved''​ or ''​surface=gravel''​. For a detailed list of surface values, have a look at the [[https://​wiki.openstreetmap.org/​wiki/​Key:​surface|OSM Wiki]]. 
 + 
 +==== Narrow ==== 
 + 
 +Finding if a road is narrow or not is very difficult and mostly based on guessing. We try to guess if a road s narrow or not by using different sets of attributes, however it is difficult to exactly determine if a road is narrow or not
  
 ===== Issue with Turn Instructions ===== ===== Issue with Turn Instructions =====
web/faq/incorrect_routes.1522452526.txt.gz · Last modified: 2018/03/31 01:28 by admin