[rich_sasha]

Great!

How do you determine quiet-ness? Is it just by the grade of the road, or do you have some kind of data feed for quietitude?

E.g. in the UK, some A-roads can be very quiet despite being technically major, whereas some B-roads or even ungraded can be very busy, e.g. if they are used as shortcuts.

[Doctor_Fegg]

It's by historic traffic data where available, defaulting to road class if not. (Before I added the traffic data, it used to route over rough mountain tracks in the Highlands to avoid A roads...)