noun
hanging ad in train/bus aisle
Refers specifically to advertising posters suspended from the ceiling along the center aisle of public transportation vehicles.
通勤電車の中吊り広告を見て、新しい映画を知った。
I learned about a new movie from a hanging ad on the commuter train.
Compound of 中 (naka, 'inside') + 吊り (tsuri, 'hanging') + 広告 (kōkoku, 'advertisement').