Lombard Street has a natural 27% grade

來源: TYM 於 2010-02-05 19:05:34 [] [舊帖] [給我悄悄話] 閱讀數 : (66 bytes)
回答: 27% hill is NOT steep at all! 由 sdww2010 於 2010-02-05 17:08:57

That's why they put the crooked section there to reduce the grade

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