Will be drafting language for the new unpaved and Off-road / Not Maintained on Road Type
Current wazeopedia:
Other drivable roads 
Off-road / Not maintained Road
The Off-road / Not maintained (formerly Dirt Road / 4x4) type has the unique property that Waze users may ask not to be routed over it. Users may ask to avoid it for all through routing with the settings option "Dirt roads - Don't allow", or to avoid it for through routing longer than 300 m (984 ft) with the option "Dirt roads - Avoid long ones".
Because of this property, this type typically represents public side roads that some fraction of local drivers habitually avoid due to surface quality. In metropolitan or other urbanized regions, this generally means unpaved (dirt, gravel, crushed rock) roads, or roads in uncommonly poor condition by local standards. In other areas, roads with unpaved surfaces may be essential routes and thus necessarily set to other types such as Street, Primary Street, or even higher, as if they were paved.
Check your state page for details on whether your state follows unique guidelines for dirt roads, or contact your regional coordinator for further guidance.
Proposed Change:
Drivable roads
Unpaved check box
This is an attribute that can be used on any type of drivable road. It should be used for gravel or grass or unrutted dirt roads. The app will avoid the segments that have this attribute checked.
This attribute has the unique property that Waze users may ask not to be routed over it. Users may ask to avoid it for all through routing with the settings option "Dirt roads - Don't allow", or to avoid it for through routing longer than 300 m (984 ft) with the option "Dirt roads - Avoid long ones".
Because of this property, this attribute typically represents public side roads that some fraction of local drivers habitually avoid due to surface quality. In metropolitan or other urbanized regions, this generally means dirt, gravel, grass, and crushed rock roads or roads in uncommonly poor condition by local standards. In other areas, roads with unpaved surfaces may be essential routes and thus necessarily set to other types such as Street, Primary Street, or even higher.
Check your state page for details on whether your state follows unique guidelines for unpaved roads, or contact your regional coordinator for further guidance.
Other drivable roads
Off-road / Not maintained Road
The Off-road / Not maintained (formerly Dirt Road / 4x4 and Unpaved) segment types had the unique property that Waze users may ask not to be routed over it. That has now shifted to the unpaved attribute check box (see above).
Off-road / Not maintained is typically deeply rutted, irregular shaped rocks, and deep streams, creeks, or river crossings. A typical car would bottom out or even break an axle. The vast majority of vehicles would not be traveling down these roads. This segment type should strictly be used for hard terrain/special vehicle type driving.
Currently, Waze does not plan to support 4X4 vehicle type in the app, but the developers have left this option to map these paths.
Check your state page for details on whether your state follows unique guidelines for hard terrain/special vehicle roads, or contact your regional coordinator for further guidance.