Wraparound advertising on taxi, bus and train will be good venture in Vietnam or Cambodia?

Question

Meaning advertisement on the taxi,bus and train. TV inside the town buses or even inside the train.

Answer 1

Buses in Ha Noi already have ads, as do some taxis.

Answer 2

Yes, depending on the brand of course, but it should have a good chance of working well. People are stuck in trains for long periods of time, with nothing to do except look at adverts inside or scenery outside, people are stuck behind buses, in taxis, walking along roads where buses and taxis drive past, etc.

Wraparound advertising on trains would be the most expensive.

The site below thinks this type of advertising works anyway.