Hello,

I've tried my best to interpret information from the wiki for highway tags. From what I've understood trunk roads are used for high-important or high-performance highways and A13 connects the biggest city in the governorate of Musandam, Khasab, to the UAE, Ras al Khaimah, while also passing by Bukha which is one of the four provinces in Musandam and passing many villages such as Harf & Qada. All of these factors led me to believe that the highway is high-important as it's the most important highway in the governorate (until the new Dibba - Lima - Khasab highway is finished). If I am misunderstanding the meaning of trunk roads, please let me know.