Incorrect routing advice of "turn right"when "straight on"was correct

[nm7s9]

When navigating north east away from Freemantle , Western Australia, along the Leach Highway (7) the Osmand offline routing, advised to "turn right on 7 Leach Highway then keep left". In fact turning right as advised resulted in turning right onto Stock road rather than the correct stay straight on onto 7 Leach highway.

This incorrect advise seemed to have been at the exact point where the trunk_link slip road deviated left off Leach Highway onto Stock road.

After turning right at the intersection, onto stock road the routing then , correctly got me to do a u_turn and then turn right back onto Leach highway.

This same error occurred again further along Leach highway at the intersection of this highway with Barbican Street, on the left, and Vahland Avenue on the right. Once again it directed me, at the point where the slip road to Barbicam Street on the left, starts, to "turn right on 7 Leach highway" whereas it should have said (if anything), continue straight on 7 Leach highway.

Leach Highway , before Stock Road 32 degree 02' 58.3" S 115 degree 47' 30.2" E
https://www.openstreetmap.org/#map=19/-32.04991/115.79043

Leach Highway, Before Barbican Street/Vahland Avenue 32 degree 02'04.2" S 115 degree 53'01.3 E
https://www.openstreetmap.org/#map=19/-32.03373/115.88470

Osmand+ 4.7.10 on Galaxy Z-Fold 4 offline maps and routing.
Map Australia - Western Australia created 01.04.2024 11.00 size 185.7 MB
Routing profile was for a car

[yuriiurshuliak]

Please provide the precise coordinates of the starting point and the endpoint of your route. This will enable us to effectively reproduce and investigate the reported routing issue with incorrect instructions turns.

[nm7s9]

Yes

[nm7s9]

On the intersection in Canberra (given above) which is the intersection of Drakford Drive Soward Way, and Erindale drive, I noticed that out of the 4 straight through routes (north, south east and west), only the East one didn't show this odd behaviour and that this one was the only route where the slip road (off to the left) had the tagging (lanes:1 turn:lanes:left)

However adding this tagging (to a completely different intersection in Canberra that also shows this same behaviour, did not fix the problem, so the lack of this tagging is also not the complete answer but may be part of a complicated routing decision.

It does seem that the behaviour is associated with turn lanes at intersections that have those short "slip road"shortcut connectors.

[vshcherb]

Yes looks like a bug which we need to create & fix

[yuriiurshuliak]

By following this link, a corresponding task is created: #19726

[nm7s9]

Is this the same issue as #15559