In a region with poor infrastructure, a road of highest importance, forming the main road network there, should be highway = trunk, regardless of being a high-quality wide asphalt road or a low-quality narrow track worse than highway = service in other regions. Examples include, the Kolyma Highway (P-504), Magadan - Anadyr road and Vilyui ice road (A-331) in the Russian Far East, a long stretch of the Trans-Amazonian Highway (BR-230) and BR-319 in the North Region of Brazil, Juba - Rumbek