Improve open area routing

[dreirund]

Is there an existing issue for this?

• I have searched the existing issues

Problem description

OpenRouteService does route on simple polygon area highways (although only on the edge, sadly). But if it is defined as a multipolygon, it does not.

To Reproduce

1. Open this routing URL.
2. Observe that it makes an "aerial jump" to the next edge of a simple polygon area highway, but not to the closer edge of the multipolygon area highway where the starting point is. And also induces a "big" detour.
   See screenshot:
   

Proposed solution

• At least, treat relation area highways the same as normal area highways and route along their edge.
• Ideally, route also inside area highways.

Additional context

Using web client at https://maps.openrouteservice.org/ with Firefox 135.0b3.

Forum Topic Link

No response

[dreirund]

MichaelsJP changed the issue type from Feature to Bug last month

I think this actually is a bug, not a feature request, as area highways defined as a relation are not routed along at all, even not at their edge, which is the case for "normal" area highways. (This in the example is defined as a relation because in the centre it has a hole.)

I have just updated the initial report with slightly moved starting position which shows more clearly the issue in generating an obvious bogous "big" detour.

GraphHopper, OSRM and BRouter have the same issue, by the way.