You can report abandoned bicycles to the Portland Bureau of Transportation (PBOT). Be sure it has been abandoned or hasn't moved in more than 72 hours.
This form should take less than 5 minutes to complete.
PBOT's Customer Service Center is closed. Applications are currently accepted by mail and fax. For short-term temporary permit, please email PBOTParkingPermits@portlandoregon.govwith your full name, address, and license plate number so staff can send you a PDF to print.