Avoid ferries unless they're the only option

[SimonBradley1993]

I'm trying to adjust the car.lua profile to result in any ferry route being ignored unless it is the only option.

I've been struggling to find a way of doing this, through setting max speeds / rate / weights or penalties for using ferries. Most of what I have tried has resulted in no change (my profile changes are definitely being picked up after regenerating the dataset) in the route created.

The only thing that has made a difference is setting the ferry speed to 0 in this block route_speeds = { ferry = 0, shuttle_train = 10 },

This results in a very odd route that doesn't end at the location specified. I've tried setting the ferry speed very low, something like 0.001 but this results in a segmentation fault during the osrm-extract command, which I assume is due to the decimal point.

Are there any docs or advice on how to configure the car.lua profile so ferry routes are only used as a last resort?

[SimonBradley1993]

I've been investigating this more and have come up with a way of doing this for anyone that has this same problem.

The OSM data has duration tags against ferry routes, which means that any modifications to the ferry speed or any attempts to add penalties for using ferry routes seems to be ignored by OSRM over using the OSM tags.

So I ended up modifying this duration tag for specific ferries in OSM and this had the desired outcome of avoiding a ferry route unless there is no other option, or if the road route is much, much longer depending on the requirements.

I'll close this now