The topographic complexity of the communes that are located on the hillside has resulted in the difficulty to ensure adequate accessibility from the system of roads and public transport. The urban road system in these areas has been spreading out as an informal road frame over areas with a low to moderate slope. However, in high-slope areas, the road infrastructure has been built by the same population for themselves to guarantee their connection with the consolidated city that is located in the lower and central part of Medellín.
