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RAIL Magazine on Twitter: "Should note how Mexico rail transit fits here: the Xochimilco tram line was never abandoned and was later converted to light-rail (like PIT), so Mexico City should count
Time's Running Out, What's on Your Houston Bucket List? | Visit houston, Houston bucket list, Light rail
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MAX Light Rail | The Official Guide to Portland
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List of metro systems - Wikipedia
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List of metro systems - Wikipedia
List of urban rail systems in Japan - Wikiwand
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The top 10 busiest metro systems in the world - Intelligent Transport
