Way of advertising using trucks in Japan

Here's one way advertising is done in Japan.

That is, using trucks.

I think it is a good way because unlike posting signs there are various advantages.

One is that the height of the advertising will be at the street level, and people do not have to look up.

Second is that because the truck drives around places, you'll have more people watching the advertisement.
(And because it drives around slowly, people will have enough time to read the ad.)

Third is like you see in the picture, if the truck drives at a time when the sky gets dark, you'll attract more attention by lighting the ad.

Some truck ads play music while they drive around so you'll definitely attract more attention compared to stable signs on the street.

Maybe in cities where you have heavy traffic, this may be one good way of advertising!!