(Portland, OR)  --  Portland is experiencing a sharp increase in the number of vehicles that are reported abandoned.  The transportation bureau says it received 27-thousand reports of abandoned vehicles in 2016, up from only seven-thousand in 2012.  Bureau spokesman John Brady says an increase in homelessness and more awareness have likely been factors in the dramatic rise in the number of abandoned vehicles.  KGW-TV reports there are so many abandoned vehicles that unless they have flat tires, broken windows or expired tags, the city will not follow up on reports.