Pros: It will automatically orient to either a frontal or rear collision and has tons of contact area with the body. If it's made of even a slightly stretchy material it would also spread the force out over some period of time.
Metros have them, and in my experience the rear-facing seats are more comfortable, as metros decelerate much faster than they accelerate (or at least in Lille, I didn't notice it as much in three other metros I took).
Scoundreller|2 years ago
Seems like only bi-directional train cars have them, or trams that rarely slow down rapidly.
seszett|2 years ago
bombcar|2 years ago
dumbfounder|2 years ago