I feel like it'd cause more difficulties for the server than creating actual roleplay, though. Because it would need to be fixed, and the area would need to be blocked off, and a elevated railway collapse isn't really a small thing (meaning that whole segment would likely fall if something bad like that happened). Also, the trains run on seperate tracks, and they don't run off lights. They run off computer systems through Combine technology, and I don't feel like there'd simply be a 'glitch' in the system that'd cause something this bad.