Which speed-related OSM tags does OSRM use?

[wolfbert]

Hi, as part of an OSM tag cleanup in Austria (which is being discussed in the community), I'm interested in which speed-related tags are actually used by OSRM. Examples include

• OSM country specific defaults for highway=*
• minspeed, maxspeed and maxspeed:conditional
• maxspeed:type, source:maxspeed
• zone:*
• ?

From car.lua I gather that the highway defaults and maxspeed are used. Not sure about anything else though.

[DennisOSRM]

Have a look at taginfo.json for all the tags that are evaluated.

[wolfbert]

Thanks, just what I was looking for. I'm still a bit confused though. What does

{"key": "maxspeed", "value": "AT:rural"}, {"key": "maxspeed", "value": "AT:trunk"},

refer to? We have the country specific default speeds on an OSM Wiki page, and the tags on the highways (e.g. "highway=secondary, maxspeed=100, maxspeed:type=AT:rural"). Key maxspeed will never have value "AT:rural" (doesn't matter, since maxspeed will always have the corresponding numeric value).

Also, how do you handle maxspeed=walk? (should work out to "about 5 km/h", and we're debating replacing it with the numeric value).