Hello. Thanks for mapping on this project.
Please use the tag 'track'not in urban areas
About tagging of highways
Please read and follow the tagging rules on this linked document.
Decision tree, which tag to be used for roads
https://drive.google.com/file/d/1S48CEVi3yiAYWhIJu57jtLyv0ZVUbGwJ/view?usp=share_link
https://wiki.openstreetmap.org/wiki/East_Africa_Tagging_Guidelines
or
https://wiki.openstreetmap.org/wiki/Highway_Tag_Africa
Best regards