(Portland, OR)  --  Portland's Bureau of Transportation is looking at getting a subway through downtown.  The City could add it to its Regional Transportation Plan, which would make it eligible for federal funding.  Exactly which route the subway would take, how many stops it would have, and how much it would cost are still a long way from being determined.  Adding more public transit capacity is being looked at as the best way to meet the region's population that is expected to grow in the next two decades.