I sometimes travel on a cross country bus which has no seatbelts fitted. On this subject, I was recently reading about a war correspondent who said that the most dangerous thing in his job was not bullets but car collisions: he reminded everyone to fasten theirs -especially in war zones.
Today’s invention is a seatbelt which people can take with them from vehicle to vehicle.
It might even take the form of a proper, three-point harness woven into the front of eg a photographer’s gilet (adding some extra gadget cool, beyond the utility belt, perhaps).
The three loose ends could be thrown around and joined behind or under the seat using an extra, standard quick-release catch. The straps would then be tensioned for a more secure journey.
Useful also, I imagine if travelling in the back of a pickup with livestock across rough terrain.