Chillly, Netman, Rorym,

Thank you for your encouraging and useful comments.

Mapping in Yemen is not easy when knowing that :
- there is no road classification
- street naming is scarce and not really used. Some streets even have 2 or 3 names.
- a ring road around a city can be wider than the road connecting the two main cities of the country. Which one should be classified as a "primary rd". Is it based on its width, traffic, or importance in the network?

I have created a Yemen wiki page and will try to throw some ideas on how to classify roads. Can you please direct me to the wiki pages that would help me for that? I can not find them.