Here at Mapbox we're doing navigation on OSM with traffic data - we collect our own telemetry, and use it to guide OSM-based routing. There are numerous Android/iOS apps using our API that you could use, or you could build one yourself.
[1] https://f-droid.org/en/packages/com.github.axet.maps/ [2] https://maps.me/
Aspects of the model like noise reduction, modality classification, and speed distribution estimation also require lots of fine tuning that is specific to the telemetry being ingested & the usage patterns of the output. For example, our speed models learn and correct from observed errors in various situations over time, which is coupled to our internal metrics data.