Here in Australia, in Melbourne, the cultural capital of Australia.
There is a problem with increased population density and the strain it puts on the transportation infrastructure. The roads are clogged with cars, many of which are now large 4WD SUV type monsters, cyclists are prey to injury/death from drivers who do not believe the bicycle has a right to be on the road.
In the late 1980's the government decided that instead of putting more trains on the tracks to deal with the number of commuters, they would instead build doubledeck trains to transport more passengers at the same time. Let's call it the VIRM.
So, they invested 30 million dollars in a new fleet of doubledeck trains, oiled them up, put them on the tracks and were ready to go.
On the maiden voyage, with politicians and press in place the train left the station in the outskirts of Melbourne and happily made it's way along the tracks to the cheers and adulation of all, until, it came across the first tunnel, which was made for a single deck train (SGM/Sprinter), at which point the journey ended.