They’re ok. Iranian rail is in rough shape. Most locomotives are older US-built EMD engines that they’re maintaining with smuggled or home-grown parts, or newer

They’re ok. Iranian rail is in rough shape. Most locomotives are older US-built EMD engines that they’re maintaining with smuggled or home-grown parts, or newer Siemens or Alston engines that are less reliable but also not worn down. China does want to have a standard gauge line through Afghanistan, Iran and Turkey. But it is proving hard to accomplish and the terrain is very rough. It would eliminate break of gauge as a problem though, but introduces lots of political and security issues as well.