Last month I have travelled to Rio de Janeiro for participating the World Conference on Transport Research | WCTR 2013. The conference was big and had some interesting sessions, especially when I have also presented my paper about the Twin Hub project. The cultural experience was also important for me as I was traveling to this part of the world for the first time. I have actually extended my stay in the region. I normally like to stay in a city for long so I decided to limit my stay to Rio and Buenos Aires. Two major cities in two neighboring countries. In this blog post I would like to share my observations about the public transport in these two cities.