But did you know an Oyster card in London can't have more than 16 fare zones? This is the reason why some stations on Overground don't accept Oyster cards.
Trains in Switzerland are not allowed to have 256 axles
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Re: Trains in Switzerland are not allowed to have 256 axles
#92Earlier quoted context omitted.
Trains longer than 256 aren't the issue as the numbers roll over. The problem is trains with exactly 256 axles (or a multiple of 256), they're seen as zero.
Not an expert, but I imagine it could still cause some routing problems if a 258-axle train were mis-registered as a 2-axle train; the latter takes up dramatically more space on the network.
Considering that a train can require 2 km to break, I'm sure they keep enough space between trains that there's plenty of space for both 258 or 2 axles trains. Knowing a train is there seems much more important than its lengths (up until they decide that 2 axles trains can be much closer to another trains).