The intersection in question is quite new, so I am not surprised that there are cache issues as you guys have identified. Each routing engine will ingest new OSM data on its own schedule.
One thing that I noticed with the spurious "at the fork, turn right onto Albany Hwy" instructions in the original OSMR link <https://www.openstreetmap.org/directions?engine=fossgis_osrm_car&route=-34.9226%2C117.7915%3B-34.9670%2C117.8239#map=16/-34.9652/117.8223>, is the lack of `_link` roads. I would expect the on- and off-ramps to be tagged as `highway=trunk_link`. I suspect the routing engines are expecting the same, and therefore seeing the Menang Dr slip road <https://www.openstreetmap.org/way/1077469017> as a legitimate fork in the highway. The latest incorrect directions with "turn sharp left" are probably the result of missing turn restriction relations <https://wiki.openstreetmap.org/wiki/Relation:restriction>. I would expect some "no_u_turn" restrictions where slip roads join the two-way hwy way. For example, https://www.openstreetmap.org/way/1077469012. Some routing engines will infer this from the angle of the ways, but not all of them. Cheers, Ben On Fri, 9 Jun 2023 at 03:39, <[email protected]> wrote: > Ian > Looking again at the routing: > > 1. Continue onto Menang Drive 20m > 2. Keep right onto Menang Drive 130m > 3. Turn sharp left onto Albany Highway 20m > 4. Turn sharp right onto Menang Drive 160m > 5. Arrive at destination > > Its like its working partially off an old cache: > > 2. Keep right onto Menang Drive 130m > It thinks it can get on to Menang Dve, it used to be able, now its > 130m further east > > 4. Turn sharp right onto Menang Drive 160m > it used to be able, now its 160m of off road driving > > The routing engines work off the ways not the tiles don't they? Can > the router be working off a cached set of ways? > > Tony > > > Yes Ian > > I think you are right. It was showing the cached copy even now with the > > kink. I just refreshed it. The routing is still wrong > > > > 1. Continue onto Menang Drive 20m > > 2. Keep right onto Menang Drive 130m > > 3. Turn sharp left onto Albany Highway 20m > > 4. Turn sharp right onto Menang Drive 160m > > 5. Arrive at destination > > > > Tony > > > >> Do you mean where Menang Drv curls around and meets Albany Hwy at a > >> T-junction? If so, I took the kink out yesterday (?) - maybe the > renderer > >> hasn't caught-up with the change when you looked at it ?? > >> > >> Ian > >> > >>> Hi > >>> Sorry if this is my misunderstanding but it seems that the same mistake > >> that is made by the routers is being made by some tile >rendering > engines > >> too. The standard tile has a kink at the end of Menang Drive > (1077469021) > >> which is not there. The >cycleOSM tile renderer does not do this. > Likewise > >> the junction of Menang Drive > >>> (1077469008) is shifted NW by the Standard tile renderer but not the > >> CycleOSM tile renderer. > >>> Tony > >> > >> > >> > >> _______________________________________________ > >> Talk-au mailing list > >> [email protected] > >> https://lists.openstreetmap.org/listinfo/talk-au > >> > >> _____________________________________________________ > >> This mail has been virus scanned by Australia On Line > >> see http://www.australiaonline.net.au/mailscanning > >> > > > > > > > > > > > > _______________________________________________ > > Talk-au mailing list > > [email protected] > > https://lists.openstreetmap.org/listinfo/talk-au > > > > _____________________________________________________ > > This mail has been virus scanned by Australia On Line > > see http://www.australiaonline.net.au/mailscanning > > > > > > _______________________________________________ > Talk-au mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/talk-au >
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