Recurrence of garbage truck.
During the entire movie there are (too) many shots of garbage trucks. Not only of them driving, but frequently picking up trash.
Right near the beginning of the movie there is one, aswell as in the end.
In both scenes Ford and his wife are in a taxi and have to wait for the truck to pick up the trash (?). Polanksi even choose to have a shot of one driving away at the end.
This really struck me, as I can't think of any meaning why he has so many scenes with these trucks.
What do you all think of the meaning of this?