High Quality Content by WIKIPEDIA articles! Ub is a town and municipality located in the Kolubara District of Serbia. In 2002, the population of the town was 6,018, while population of the municipality was 32,104. Territory of Ub has favorable geographic position, due to proximity of main roads, big cities and industrial centers. Distance between Ub and nearest roads is: train traffic ? railway Belgrade ? Bar : 15 km away; river traffic ? port of Belgrade and port of ?abac : 50 km away; air traffic - Airport Nikola Tesla Belgrade : 60 km away; road traffic ? main road routes (M4, M19, M21, M22) go through this district, from where one can easily reach every city in Republic of Serbia.