6 Comments
User's avatar
Ani's avatar

This is a really informative, super interesting piece. Thank you very much for your effort!

S.Y. Lee's avatar

Thank you for reading!

Long Branch Mike's avatar

Amazing how you seamlessly weave the historical and political events into the development of Seoul's Metro network.

S.Y. Lee's avatar

Thank you as always, Mike! This is what makes rail history so interesting and a treat to write about!

Hugh Colton's avatar

60 Hz is not the Worldwide standard. If anything it’s the exception.

S.Y. Lee's avatar

Thank you. I amended the sentence. IIRC South Korea and Taiwan use 25 kV 60 Hz AC and get my phrasing wrong.