This map is included in a report titled: “Renewal and revenue: an evaluation of the urban renewal program in Detroit” by the City Planning Commission in 1962. By this time urban renewal had already been a wide ranging and destructive force since the 1950s with mass slum clearance and highway construction. The map shows areas of blight and/or redevelopment shaded in. Blight has been a mayoral focus in Detroit since the time of Mayor Jeffries in the 1940s.