To start with
When the road is truly a dirt road, it is a good idea to apply both.
Off-road / Not maintained
Indicates the road type. Waze treats it more “reluctantly”, similar to Private, and does not prefer it as a regular route.
Unpaved
Indicates that the road is not paved. This is important for routing, because if the user has Avoid unpaved roads enabled, Waze will try to avoid it when there is a reasonable alternative.
Correct setting for a passable dirt road:
• Road type: Off-road / Not maintained
• Attribute: Unpaved enabled
Accessing a destination:
If the destination is located on or near such a segment, Waze can use it when necessary. Therefore, we do not make it a “regular” road just for the sake of routing.
Conclusion: For a real dirt road that is passable/usable, we set Off-road / Not maintained + Unpaved.