4 ms·
Also, rudimentary repairs of damaged/destroyed rails are relatively fast. Proper rail construction is slow, but if you’re just aiming at something that a train
by xyzzyz 5y ago
Also, rudimentary repairs of damaged/destroyed rails are relatively fast. Proper rail construction is slow, but if you’re just aiming at something that a train can just slowly pass through, and doesn’t need to last years, you can get away with much more.