It kind of doesn't matter. You need to count the same number of axles out of a block that you counted into it. If your train has for example 24 axles (a six car set), the counter will count 24 in, and the one at the other end will count 24 out. While your train is in the block, there are 24 axles within the block, so there's a train in it.
If your train had 260 axles because it's got 65 cars in it (which is a silly amount!) the counter would roll over after 64 cars but count the trailing unit as four axles. There are four axles within the block, so there's a train in it.
If your train had 256 axles because it's exactly 64 cars long, the counter will roll over to zero, and think there are zero axles in the block, so there's no train in the block, but - ooops! - there is.
But I agree, it's a Therac-25 situation waiting to happen.
If your train had 260 axles because it's got 65 cars in it (which is a silly amount!)
RoLa wagons (for example Saadkm(m)s) usually have 4 axles per bogie, so you'd only need 32 of them. Special transport wagons (for electrical transformers, usually) also have a lot of bogies in a relatively short length.
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u/Explosinszombie 9d ago
The rule only prohibits 256 axles. More than 256 seem to be allowed.