Managua were ultimately erased. Managua is twinned with: Manuaga is part of the Union of Ibero-American Capital Cities from 12 October 1982 establishing brotherly relations with the following cities: Managua Managua () is the capital and largest city of Nicaragua, and the center of eponymous department. Located on the southwestern shore of Lake Managua, it had an estimated population 1,042,641 in 2016 within the city's administrative limits and a population of 1,401,687 in the metropolitan area, which additionally includes the municipalities of Ciudad Sandino, El Crucero, Nindirí, Ticuantepe and Tipitapa. The city was declared the national capital in 1852. Previously, the
Managua North Caribbean Coast Autonomous Region are also connected via road. A third road, currently under construction, will connect Bluefields, South Caribbean Coast Autonomous Region with Managua via Nueva Guinea. Traveling by airplane is more efficient than traveling by these roads due to the poor conditions, especially in the rainy season. Domestic flights are operated by La Costeña from the international airport. There are 36 bus routes in Managua. These are regulated by the city’s regulatory entity for municipal transports (IRTRAMMA) and individually operated by cooperatives and private companies. In addition there are two bus routes that formerly connected to outside