Bungling engineers have been left red-faced after building a railway tunnel that's too small for trains to actually fit through.
The costly mistake was only discovered when inspectors measured the finished tunnel in the Polish capital, Warsaw, and realised the roof was so low that no trains would get under it.
Rail bosses claim the mix-up happened because workers who were laying new tracks didn't talk to the team that was building the tunnel.
"During work on the tunnel, tracks were laid down on newly-raised ground which meant the distance between the tracks and roof of the tunnel became shorter," said Polish Railways spokesman Marta Szklarek.
The cock-up is the latest in a series of public transport construction fiascoes in Poland.
A tunnel built recently to divert lorry traffic in Warsaw turned out to be too low for lorries.
Last year, the Polish road authority produced plans for two sections of major motorway that would have missed each other by five miles - each coming to a dead end in the middle of the countryside.
Figures its the Polish that can fuck up a billion dollar project more than Massachusetts can. Their tunnel can't fit trains, and our tunnel leaks. Hmmmm. Tough call. I would have to give Boston the nudge, because our tunnel roof collapse killing one person.