noun
hanging advertisement (in train/bus aisle)
Refers specifically to the advertising posters suspended from the ceiling over the center aisle of public transport vehicles like trains and buses.
電車の吊り広告に新発売の飲み物が載っていた。
The hanging advertisement on the train featured a newly released drink.
Synonym; 中吊り広告 is a more specific term also meaning hanging advertisement inside a train, while 吊り広告 can be used more broadly for any hanging advertisement.
Compound of 吊り (hanging) and 広告 (advertisement).