Differences

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--- web:faq:incorrect_routes [2018/03/31 01:28] – [Roundabouts] admin
+++ web:faq:incorrect_routes [2018/06/11 08:51] – admin
@@ Line 54: / Line 54: @@
 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.
+===== 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 =====