"Five of them [streetcar lines] would replace existing bus lines." It is from a local newspaper article excerpted below:

The Minneapolis City Council voted last month, "that Minneapolis is committed to a plan to build a long-term streetcar network of six lines. Five of them would replace existing bus lines, while a sixth would provide a new connection, linking the Hiawatha [light rail] and in-the-pipeline Southwest light-rail lines through the Midtown Greenway."