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Project-OSRM / osrm-backend

Open Source Routing Machine - C++ backend
http://map.project-osrm.org
BSD 2-Clause "Simplified" License
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Route not generated between two valid locations #5368

Closed pgdhuri closed 2 years ago

pgdhuri commented 5 years ago

I have two locations from Oman as follows A. 23.0792175,57.6732554 B. 23.4996593,58.1991536

The locations are valid and the roads are also present in these locations but still the system can not generate a shortest route between these locations. I get the following message. {"message":"Impossible route between points","code":"NoRoute"}. The same route is available by Google map or grasshopper api.

Please find following screen shots explaining the same situation.

grasshopper osrm

danpat commented 5 years ago

@pgdhuri It looks like there are barrier=checkpoint nodes blocking access:

https://www.openstreetmap.org/node/532471096

and there does not appear to be any other road to access Jebel Akhdar.

Do you know if this checkpoint is generally passable? We may need to add barrier=checkpoint to the barrier whitelist

pgdhuri commented 5 years ago

Yes these check points are passable only by 4X4 all wheel drive vehicles and heavy vehicles as well. Normal cars which are not 4X4 are not allowed to go.

danpat commented 5 years ago

In that case, I'm inclined to say OSRM is correct here - there is no route for a Car (which is what the routing is designed for).

The OSM tagging could probably be improved in this area, adding something like access=no and 4wd_only=yes which would make it clearer as to why.