I changed these to path because they connect isolated settlements. The Highway Tag Africa page says paths “may be the primary access route for isolated settlements.” Originally they were secondary. I see what you are saying and will use unclassified when roads connect settlements like these ones.

Hi, thanks for mapping. Regardless of the speed limitations on the road, the OSM wiki says that the most important roads in a country (like the N1 is in Djibouti) should be trunk: highway=*#Values. Here is a reference map: https://upload.wikimedia.org/wikipedia/commons/3/36/Map_of_RN-1.png