JOSM has a [routing plugin][1] option: I have not used but it seems that you can use this on the data you have loaded in to JOSM. JOSM. I noticed this query that related to the plugin: https://help.openstreetmap.org/questions/30832/how-do-i-use-the-josm-routing-plugin [1]: https://wiki.openstreetmap.org/wiki/JOSM/Plugins/Routing

JOSM has a [routing plugin][1] option: I have not used but it seems that you can use this on the data you have loaded in to JOSM. [1]: https://wiki.openstreetmap.org/wiki/JOSM/Plugins/Routing