To solve traffic congestion in the city, Sarajevo-based architect Muzafer Osmanagić proposed a study called "Eco Energy 2010–2015", idealizing a subway system underneath the bed of the river Miljacka. The first line of Metro Sarajevo would connect Baščaršija with Otoka. This line would cost some 150 million KM and be financed by the European Bank for Reconstruction and Development.