I love the concept of advertising-free cities! It's actually the advertising situation with public transport that I have found particularly frustrating where I am. For instance, some bus seats have transport maps on the ceiling above them, but others have private advertisements. Likewise, some stations have dozens of electronic advertising boards where they could have timetables. Perhaps they could at least have a button on them to switch them momentarily to a map or timetable.

I wonder how many millions of people have missed their train/bus connection because they couldn't find a departure board among the billboards.