Two-story size (or higher) bus or a train wagon that has no partition between floors, instead, the whole vertical space is used to install spectator seating. In the front of the vehicle, there's a mini stage for lectures, performances, and other types of events or/and a screen for watching videos.
It's a solution to this challenge.
The placing of the seats in vehicles is almost exclusively horizontal. This takes away the possibility to conveniently use the space in front for entertainment/education of the passengers. I haven't found anything similar to what I'm proposing online.
This would be perfect for city sightseeing buses that drive around and play a recorded talk about famous places/objects on the way. You could have a real or a holographic (since it's hard and dangerous to maintain balance standing while the vehicle moves) lecturer talking and pointing to places/objects behind the bus windows. You could have a continuous window without any partitions on both sides of the bus for a better view.
Entertainment for passengers on longer intercity or even international travels. Especially convenient on trains where you could have one wagon dedicated to this.
All the spectator-passengers should wear seatbelts all the time while the vehicle is moving to avoid accidents. If necessary, specialized structures to hold the spectators in place (like on amusement rides) could be used.
Movies would be the easiest thing to implement, but the most boring one. The best would be to enable spectators to watch live lectures/performances. But as I already mentioned, the problem with this is that it's dangerous to stand and lecture/perform while the vehicle is moving. A lecturer could sit, but that's also not the best option. I think a good solution to this is holographic lecturers/performers. The holograms could be broadcasted live, the technology for high-quality, live holograms is already well developed. The projector would stabilize the hologram according to the vehicle's movements.
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