User chooses to take a long boomerang transfer at a far away station rather than walk across the street

[luyuliu]

As title. I found that some returned results in detailed_itineraries() rather do a long boomerang transfer than walking across the station. See an example:

The left part of the trip shouldn't exist.

Zoom in:

The brown lines are OSM streets.

The user should alight at the blue stations and walk to the destination, but because the links are deemed impassable by pedestrians.

Not relevant but here is the result from Googlemap

Guess this is a data issue? But feels like the snapping rules are also one of the factors that caused this. Feel like large stations are more vulnerable to these kinds of errors.

[luyuliu]

Different levels of roads can also caused this

[rafapereirabr]

Hi @luyuliu . Thanks for reporting this. This seems like an important issue upstream in R5, specifically in the McRAPTOR routing algorithm used here. There is nothing we can do from the r5r side, so I would strongly suggest opening this issue in the R5 repo.

[luyuliu]

Thanks. I will report this to r5. Close the issue for now.

[rafapereirabr]

Thanks @luyuliu . Issue transferred to conveyal/r5#916