Coupling sets of 4, 5 or 6 coach trains together is done regularly. There are scheduled trains where this is done partway through the journey. https://m.youtub

Coupling sets of 4, 5 or 6 coach trains together is done regularly. There are scheduled trains where this is done partway through the journey. https://m.youtube.com/watch?v=1j2e-R1cv9w https://m.youtube.com/watch?v=1j2e-R1cv9w