Trans-Siberian Railroad Achievement | Civ 6: Gathering Storm I've searched through the boards for some information after Gather Storm dropped but I haven't found anything. I've been running an Inland Sea Huge map and I'm wondering if I've shot myself in the foot by connecting most of my cities by rail with Military engineers.

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It sounds silly but the achievement's wording is that the cities have to be connected by **roads**, it doesn't mention rail. While I would hope this isn't the case I'm starting to get worried as I've got 5 or six trade routes running at 70+ turns over land all of which are connected by rail at this point. Thoughts?