in switzerland you aren't allowed to have a train with exactly 256 axles because of an integer overflow in the axle counting machine
i wish i could fix my software bugs by making it illegal to cause them
the source everyone reports for this PDF is gone, and it's not exactly easy to find swiss train law documentation when you don't even speak german
but here's a current link: https://www.hech.ch/wp-content/uploads/2018/07/I-30111_09122018_Anhoerung.pdf
page 123, section 4.8.4 "Zugbildung"
@lynnesbian does it also outlaw trains with 512 axles tho
@kity i assume nobody's made a train with that many axles yet