Lombard Street has a natural 27% grade

来源: TYM 于 2010-02-05 19:05:34 [] [旧帖] [给我悄悄话] 阅读数 : (66 bytes)
回答: 27% hill is NOT steep at all! 由 sdww2010 于 2010-02-05 17:08:57

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

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