Answer: detroitmichigan

AnswerCrossword Clue
DETROITMICHIGANCity founded by Antoine de Cadillac
DETROITMICHIGANRiver port
DETROITMICHIGANHome of Sen. Levin
DETROITMICHIGANHome of America's first automatic traffic light, ca. 1920